Good interface typography makes hierarchy and reading easier. A font pairing does not need to be unusual; it needs to stay legible across headings, controls, dense information, and smaller screens.
Give each font a clear job
Start with one body family that reads well at the sizes your interface uses. Add a heading family only if it adds a useful distinction. If the fonts compete, share a characteristic—such as similar proportions—or keep one family and create hierarchy with weight and size.
Use a short size scale
:root {
--text-sm: 0.875rem;
--text-base: 1rem;
--text-lg: 1.25rem;
--text-xl: 1.75rem;
}
body { font-size: var(--text-base); line-height: 1.5; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.1; }A small scale is easier to apply consistently. Adjust line height for the actual type size and keep long paragraphs at a comfortable measure. A heading should wrap naturally on a narrow screen rather than forcing a fixed width.
Preview the pairing in context
Check numerals, punctuation, bold weights, button labels, and long headings—not just the letters “Aa.” Watch for layout shifts if fonts load after the page. Choose the weights you use and provide a sensible fallback stack.
LiveTheme lets you compare heading and body fonts on interface templates. Try a font pairing in the editor, then review it in the screens where your users will read it.