FontBlend

Typography Guide

Typography is one of the most important elements of visual communication. The right combination of typefaces can improve readability, establish hierarchy, strengthen brand identity, and make digital or printed content more effective.

This guide provides practical principles for choosing, combining, and applying fonts with FontBlend on ToolApp Pro.

Website: https://toolapp.pro/

1. What Is Typography?

Typography is the art and technique of arranging type so that written content is clear, readable, visually balanced, and appropriate for its purpose.

Typography includes decisions about:

  • font family;
  • font size;
  • font weight;
  • line height;
  • letter spacing;
  • text alignment;
  • hierarchy;
  • contrast;
  • paragraph width;
  • font pairing;
  • spacing between elements.

Good typography should make content easier to understand, not harder to read.

2. Typeface vs. Font

Although the terms are often used interchangeably, they are technically different.

Typeface

A typeface is the overall visual design of a family of characters.

Examples include:

  • Inter;
  • Roboto;
  • Playfair Display;
  • Lora;
  • Montserrat.

Font

A font is a specific variation within a typeface.

For example:

Inter Bold 700

is a font within the Inter typeface family.

3. Main Font Categories

Understanding the major typeface categories makes font selection easier.

Serif

Serif typefaces include small finishing strokes at the ends of characters.

They are commonly associated with:

  • editorial design;
  • books;
  • magazines;
  • luxury brands;
  • traditional identities;
  • sophisticated visual systems.

Examples:

  • Lora;
  • Merriweather;
  • Playfair Display;
  • Libre Baskerville.

Serif fonts can work especially well for headings, editorial layouts, and longer text when appropriately sized.

Sans Serif

Sans serif fonts do not contain the small finishing strokes found in serif fonts.

They generally communicate:

  • simplicity;
  • clarity;
  • modernity;
  • technology;
  • efficiency.

Examples:

  • Inter;
  • Roboto;
  • Open Sans;
  • Montserrat;
  • Poppins.

Sans serif fonts are widely used in websites, applications, dashboards, interfaces, and digital products.

Display

Display fonts are designed primarily for large sizes.

They can provide:

  • personality;
  • visual impact;
  • brand recognition;
  • decorative character.

They are best used for:

  • titles;
  • hero sections;
  • posters;
  • logos;
  • short phrases.

Display fonts are usually unsuitable for long paragraphs.

Monospace

In a monospace typeface, every character occupies approximately the same horizontal width.

These fonts are frequently used for:

  • programming;
  • technical documentation;
  • code;
  • developer interfaces;
  • data presentation.

Examples:

  • JetBrains Mono;
  • Source Code Pro;
  • IBM Plex Mono.

Script

Script fonts imitate handwriting, calligraphy, or lettering.

They are often used for:

  • invitations;
  • premium branding;
  • signatures;
  • decorative headings;
  • elegant visual identities.

Use script fonts carefully because they can become difficult to read at small sizes.

4. Establish Clear Typographic Hierarchy

Typographic hierarchy helps readers understand which information is most important.

A typical hierarchy may include:

  • Display title;
  • H1;
  • H2;
  • H3;
  • body text;
  • caption;
  • label;
  • helper text.

Hierarchy can be created through:

  • size;
  • weight;
  • spacing;
  • color;
  • font family;
  • capitalization;
  • position.

Avoid relying only on font size.

A strong hierarchy combines multiple visual signals.

5. Recommended Size Relationships

There is no universal type scale, but consistent proportional relationships usually produce better results.

Example:

Display: 48–72 px
H1: 36–48 px
H2: 28–36 px
H3: 22–28 px
Body: 16–20 px
Small text: 13–15 px
Caption: 12–14 px

These values should be adapted according to:

  • screen size;
  • project type;
  • audience;
  • font characteristics;
  • accessibility requirements.

A 16 px size in one typeface may appear visually larger or smaller than 16 px in another.

6. Body Text Readability

Body text should prioritize reading comfort.

For most websites and applications, a useful starting point is:

Font size: 16–18 px
Line height: 1.5–1.7
Font weight: 400–500
Line length: approximately 45–75 characters

Very wide paragraphs can be difficult to follow.

Very narrow paragraphs may create excessive line breaks and disrupt reading flow.

7. Line Height

Line height is the vertical distance between lines of text.

For body copy, a line height between approximately:

1.4 and 1.7

is often effective.

Headings can generally use tighter line height, such as:

1.05 to 1.3

Example:

body {
  font-size: 18px;
  line-height: 1.6;
}

h1 {
  font-size: 48px;
  line-height: 1.1;
}

The ideal value depends on the typeface.

8. Letter Spacing

Letter spacing controls the horizontal distance between characters.

Also known as:

tracking

Use it carefully.

Headings

Large headings can sometimes benefit from slightly tighter spacing.

Example:

letter-spacing: -0.02em;

Uppercase Labels

Small uppercase labels may benefit from slightly wider spacing.

Example:

letter-spacing: 0.08em;

Body Copy

Body text usually works best with the font’s default spacing.

Excessive tracking can reduce readability.

9. Font Weight

Font weight affects hierarchy and emphasis.

Common numeric weights include:

100 — Thin
200 — Extra Light
300 — Light
400 — Regular
500 — Medium
600 — Semi Bold
700 — Bold
800 — Extra Bold
900 — Black

A practical interface system might use:

  • 400 for body text;
  • 500 for labels;
  • 600 for subheadings;
  • 700 for headings.

Using too many weights can make a layout visually inconsistent.

10. How to Pair Fonts

Font pairing means combining two or more typefaces in the same visual system.

The goal is not simply to choose two attractive fonts.

They should complement each other.

A useful pairing usually combines:

contrast + compatibility

For example:

Serif heading + sans serif body

This can create a strong editorial contrast.

Another option:

Geometric sans heading + neutral sans body

This can produce a modern interface aesthetic.

11. A Simple Font Pairing Formula

A reliable approach is:

Font A: personality
Font B: readability

Font A can be used for:

  • headings;
  • hero titles;
  • branding elements.

Font B can be used for:

  • paragraphs;
  • labels;
  • navigation;
  • interface elements.

Example:

Playfair Display + Inter

Playfair Display provides character.

Inter provides clarity.

12. Avoid Fonts That Compete

Two highly decorative fonts often compete visually.

Avoid combinations where both fonts have:

  • strong personality;
  • unusual shapes;
  • heavy ornamentation;
  • extreme contrast;
  • complex letterforms.

One font should usually play the dominant role.

The other should support it.

13. Use Contrast Intentionally

Font combinations can contrast in several ways.

Serif + Sans Serif

One of the most common and effective combinations.

Heavy + Light

Example:

Bold headings with regular body copy.

Geometric + Humanist

Creates subtle visual contrast.

Traditional + Modern

Useful for editorial or premium branding.

Avoid combinations that look almost identical unless they belong to the same type family.

14. Use One Type Family

You do not always need multiple typefaces.

A single well-designed family may include enough weights and styles to create a complete hierarchy.

For example:

Inter

could be used as:

  • Inter 700 for headings;
  • Inter 600 for subheadings;
  • Inter 500 for labels;
  • Inter 400 for paragraphs.

This approach provides strong visual consistency.

15. Font Pairing Examples

Editorial

Playfair Display + Source Sans 3

Good for:

  • blogs;
  • editorial websites;
  • magazines;
  • lifestyle brands.

Modern SaaS

Manrope + Inter

Good for:

  • dashboards;
  • software;
  • SaaS platforms;
  • applications.

Elegant Brand

Cormorant Garamond + Montserrat

Good for:

  • luxury branding;
  • beauty;
  • fashion;
  • premium services.

Friendly Digital Product

Poppins + Open Sans

Good for:

  • education;
  • family-oriented products;
  • mobile apps;
  • friendly brands.

Technical

IBM Plex Sans + IBM Plex Mono

Good for:

  • developer tools;
  • documentation;
  • technical dashboards.

16. Typography for Websites

Website typography should remain readable across:

  • desktop;
  • tablet;
  • mobile;
  • different resolutions;
  • different browsers.

Responsive typography can use CSS functions such as:

font-size: clamp(2rem, 5vw, 4rem);

This allows typography to scale according to screen width.

17. Typography for Mobile

Mobile interfaces require special attention because of limited screen width.

Recommended practices include:

  • avoid extremely large headings;
  • maintain body text around 16 px or larger;
  • keep adequate line height;
  • avoid very long line lengths;
  • maintain clear button labels;
  • preserve sufficient contrast.

Never sacrifice readability simply to fit more content on the screen.

18. Typography for UI Design

Interface typography should support fast scanning.

Typical interface elements include:

  • buttons;
  • navigation;
  • form labels;
  • input fields;
  • tooltips;
  • cards;
  • notifications;
  • menus.

Use consistent sizes and weights across equivalent elements.

For example:

Button: 14–16 px, 600
Label: 13–14 px, 500–600
Body: 16 px, 400
Card title: 18–20 px, 600

19. Typography for Branding

Typography strongly influences brand personality.

Different type styles can communicate different attributes.

Serif

Can suggest:

  • sophistication;
  • heritage;
  • authority;
  • tradition.

Geometric Sans

Can suggest:

  • innovation;
  • technology;
  • precision;
  • modernity.

Rounded Sans

Can suggest:

  • friendliness;
  • accessibility;
  • informality.

High-Contrast Serif

Can suggest:

  • elegance;
  • luxury;
  • editorial sophistication.

Choose fonts based on brand personality rather than trend alone.

20. Typography for Logos

Fonts used in logos should be evaluated carefully.

Consider:

  • uniqueness;
  • scalability;
  • licensing;
  • readability;
  • trademark implications;
  • character shapes;
  • kerning;
  • long-term relevance.

Do not assume that a font available online can automatically be used in a commercial logo.

Always verify its license.

21. Kerning

Kerning adjusts the spacing between individual pairs of letters.

For example:

AV

may require different spacing from:

NN

Professional typefaces typically include built-in kerning data.

Logo design and large display typography may require manual kerning adjustments.

22. Measure

Measure refers to the width of a line of text.

For long-form reading, an effective measure is often around:

45–75 characters per line

This range is not absolute, but excessively wide paragraphs can reduce reading comfort.

23. Alignment

Common text alignment options include:

  • left;
  • center;
  • right;
  • justified.

For most long-form digital content:

left alignment is generally the safest choice.

Centered text works better for:

  • short headlines;
  • hero sections;
  • invitations;
  • short statements.

Avoid centering long paragraphs.

24. Avoid Excessive All Caps

Uppercase text can work well for:

  • labels;
  • navigation;
  • short headings;
  • categories.

However, long paragraphs in uppercase are harder to read.

Use all caps selectively.

25. Contrast and Accessibility

Typography should remain readable against its background.

Low-contrast text can be difficult to read for users with visual impairments or in poor lighting conditions.

Avoid combinations such as:

  • light gray text on white;
  • pale yellow on white;
  • dark gray on black;
  • saturated colors with insufficient contrast.

Always evaluate contrast in the actual interface.

26. Avoid Very Thin Fonts

Thin font weights may look elegant on large displays but can become difficult to read on:

  • small screens;
  • low-resolution displays;
  • bright environments;
  • low-contrast backgrounds.

For body copy, regular or medium weights are usually more reliable.

27. Limit the Number of Fonts

Most projects do not need many typefaces.

A useful rule is:

1–2 font families for most interfaces

Occasionally a third may be appropriate for special purposes.

Too many typefaces can create visual inconsistency.

28. Create a Typography System

Instead of choosing font sizes independently on every page, define reusable typography tokens.

Example:

:root {
  --font-display: 56px;
  --font-h1: 42px;
  --font-h2: 32px;
  --font-h3: 24px;
  --font-body: 17px;
  --font-small: 14px;
}

A systematic approach improves consistency and scalability.

29. Use FontBlend to Test Pairings

FontBlend can help you experiment with typography before committing to a final combination.

A useful workflow is:

  1. Select a primary font.
  2. Choose a secondary font with appropriate contrast.
  3. Test headings and paragraphs.
  4. Compare font weights.
  5. Evaluate readability.
  6. Check visual hierarchy.
  7. Test on different screen sizes.
  8. Verify font licensing.
  9. Save or document the selected combination.

Do not evaluate fonts based only on their names or individual appearance.

Always test them together in realistic content.

30. Evaluate Fonts Using Real Content

Placeholder text can be useful, but real content provides better results.

Test:

  • short headings;
  • long headings;
  • paragraphs;
  • numbers;
  • dates;
  • punctuation;
  • uppercase text;
  • buttons;
  • navigation;
  • accented characters.

This is particularly important for multilingual projects.

31. Character Support

Before choosing a font, verify whether it supports the characters your project requires.

For Portuguese, confirm support for characters such as:

á à â ã é ê í ó ô õ ú ç

International projects may also require:

  • extended Latin;
  • Cyrillic;
  • Greek;
  • Arabic;
  • Hebrew;
  • Asian scripts.

Font support varies significantly.

32. Variable Fonts

Variable fonts can include multiple styles within a single font file.

They may allow continuous adjustment of properties such as:

  • weight;
  • width;
  • slant;
  • optical size.

Example:

font-variation-settings: "wght" 650;

Variable fonts can improve flexibility and reduce the need for multiple separate font files.

33. Web Font Performance

Fonts can affect website performance.

Using too many font families and weights may increase:

  • download size;
  • page load time;
  • rendering delays.

A more efficient configuration might include:

  • one or two font families;
  • two to four necessary weights;
  • modern font formats;
  • appropriate caching.

Avoid loading font weights that are never used.

34. Font Fallbacks

Always define fallback fonts.

Example:

font-family: "Inter", Arial, sans-serif;

If Inter fails to load, the browser can use an alternative font.

A robust font stack improves reliability.

35. Common Typography Mistakes

Avoid:

  • too many font families;
  • excessive use of bold;
  • very small body text;
  • inadequate line height;
  • extremely wide paragraphs;
  • decorative fonts in long text;
  • inconsistent font sizes;
  • poor contrast;
  • random letter spacing;
  • using fonts without checking licensing.

36. Font Pairing Checklist

Before finalizing a pairing, ask:

  • Are both fonts readable?
  • Is there enough contrast between them?
  • Do they feel visually compatible?
  • Is the hierarchy obvious?
  • Does the body font work in long paragraphs?
  • Does the heading font retain clarity at different sizes?
  • Are the fonts appropriate for the brand?
  • Do they support the required characters?
  • Are the necessary weights available?
  • Does the license allow the intended use?

If the answer to these questions is yes, the combination is likely suitable for further testing.

37. Practical Recommendation

For most projects, prioritize:

Readability first. Personality second.

Typography should support the content rather than compete with it.

A successful font pairing should feel deliberate without distracting the reader.

38. Explore Typography with FontBlend

Use FontBlend to compare typefaces, experiment with font pairings, and build clearer visual hierarchies for your projects.

FontBlend is available on ToolApp Pro:

FontBlend

Experiment with different combinations, evaluate them using real content, and choose typography based on readability, purpose, visual identity, and appropriate licensing.

ToolApp Pro — Smart tools. Real results.

FontBlend — Explore, compare and combine typography with greater clarity.