Typography System Research

Serif fonts include small strokes at the ends of letters. They create a more classic and formal look and are commonly used in reading-heavy experiences.

Where to Use Serif Fonts:

• Print media (books, newspapers, magazines) - Serifs help guide the eye across longer passages of text.
• Branding for luxury, law, or academic products - Often associated with trust, tradition, and authority.
• Long-form content (blogs, essays, reports) - Works well in structured layouts focused on reading.

Sans serif fonts remove decorative strokes and focus on simple letterforms. They are easier to read on screens and work well in modern interfaces.

Where to Use Sans Serif Fonts:

• Digital interfaces (websites, apps, dashboards) - Cleaner shapes improve readability across different screen sizes.
• Tech products and modern brands - Creates a more approachable and contemporary feel.
• Short-form content (headlines, buttons, captions) - Easy to scan quickly in fast interactions.

Decorative fonts use stylized letterforms meant to attract attention. They work best in small amounts where visual impact matters more than reading speed.

Where to Use Decorative Fonts:

• Logos and branding - Helps create a distinct visual identity.
• Posters, banners, and social media graphics - Useful for grabbing attention in marketing content.
• Specialty headlines - Works for titles where personality or style is important.

Avoid in body text - Decorative fonts slow down reading and reduce clarity in longer content.
Avoid excessive use - Too many decorative styles create visual noise and make interfaces feel inconsistent.

It should support writing systems such as Latin, Cyrillic, Arabic, or Asian character sets allows more users to read and interact with the product comfortably.

The typeface should maintain a consistent visual style across all supported languages. Differences in letter proportions, spacing, or alignment become noticeable in structured layouts such as tables, buttons, forms, or navigation.

Even small inconsistencies can make text appear slightly misaligned and affect the overall polish of the interface.

Strong language support reduces the need to replace fonts later when expanding into new markets. This avoids unnecessary design and development work across the product.

Always validate spacing, line height, wrapping, and readability using non-English content. Some languages create longer words, denser text, or different vertical spacing requirements.

Many open-source typefaces include broad language support and are easier to scale across products and teams.

Examples:

• Roboto
• Noto Sans
• Inter

Here are all the industry standards factors/multipliers:

Step 3: Setting up the line Height

A practical way to define line height is by starting with a multiplier.

Typical range: 1.1 → 1.6
Example: 14px × 1.4* = 20px line height

This helps establish a readable starting point for each typography category.

*The multiplier is only used to find the base line height for the category's most common font size.

Once the base line height is defined, stop relying on multipliers and build the rest of the scale using fixed increments of 2px or 4px. This creates a cleaner and more predictable typography system.

Note!

Round line heights to values dividable by 2 to maintain alignment consistency across layouts and spacing systems.

Example:

If the result is: 57.5 → 56 (rounded to the nearest number that is a multiple of 2)
If the result is: 63 → 64 (rounded to the nearest number that is a multiple of 2)

- Category's Base Scale Indicator (Most used from the category)

The Body Scales

Body scales are split into three categories because they serve different readability and layout needs across the interface.

• Body Defaults & Body Variants - These are the default fonts styles and their relaxed and compact versions.
• Body For Tables - These font styles are a optimized for data heavy tables and grids.
• Label Defaults - These are the default fonts styles linked with labels and captions.

Step 4: Apply the same logic everywhere

Each typography category should follow the same structure:

• Choose the most commonly used font size
• Find a readable line height using a multiplier
• Lock that as the base style for the category
• Scale the remaining styles using fixed increments of +2px or +4px

Apply this process consistently across:

• Display
• Headlines
• Paragraph/Body
• Labels

Why this approach works?

• Keeps spacing consistent across the interface
• Avoids awkward values such as 21px or 27px
• Makes the system easier to scale and maintain
• Works well in dense, data-heavy products where alignment and readability matter more visibly

1. All Readable Text Must Meet at Least 4.5:1 Contrast (WCAG 2.1)

Any text that communicates information should maintain a minimum contrast ratio of 4.5:1 against its background. This includes primary, secondary, and supporting text. Users should not need extra effort to read lower-priority content.

2. Large Text May Meet 3:1, but Readability Still Matters

Large text can meet a 3:1 contrast ratio under WCAG guidelines, but readability should still be evaluated visually. Passing contrast requirements does not automatically guarantee comfortable reading.

1. Pixels (px)

Pixel-based line heights provide precise control and work well in static layouts or graphic design where responsiveness is less important.

For web and product design, unitless values (such as 1.5) or percentages (such as 150%) work better because they scale naturally with the font size. This keeps spacing more consistent across screen sizes and responsive layouts.

Alignment helps users scan content faster and understand relationships between elements more easily. Consistent alignment creates cleaner reading patterns and improves layout structure.

Use left, right, center, or justified alignment depending on the context, but avoid excessive justified text because uneven spacing between words can reduce readability.

Don't

Do

Consistent typography styles help users quickly understand what content is most important and how information is grouped. When font sizes, weights, or styles are inconsistent, scanning becomes slower and the interface feels less organized.

Text should remain easy to read against its background and surrounding elements. Overusing colors or relying on overly harsh contrast can create visual fatigue, especially in reading-heavy interfaces.

Maintain a minimum contrast ratio of 4.5:1 for readable text to support accessibility and improve clarity across different viewing conditions.

White space improves readability by giving text and UI elements enough room to breathe. Spacing between lines, paragraphs, sections, and components helps users scan content faster and makes layouts feel more balanced and easier to navigate.

Make Typography Responsive

Typography should scale smoothly across different screen sizes and resolutions. Using responsive line-height values such as percentages or unitless ratios helps maintain readable spacing and more consistent proportions across devices.