Source Serif 4 and Karla font pairing
Serif headings with a sans serif body.
Good pairings feel inevitable. Great ones set the tone before a single word is read.
Typography sets the tone before a single word is read. A strong pairing creates clear hierarchy while feeling like one consistent voice across every page. This paragraph is set in Karla, while the headline uses Source Serif 4. Numbers like 0123456789, punctuation “quotes” — and ampersands & — reveal a lot about how two typefaces get along.
Look for contrast in structure and harmony in proportion: similar x-heights, compatible widths and a shared sense of rhythm. Bold text and italic text should feel natural, too.
Why this pairing works
A classic contrast: Source Serif 4's serifs give headlines an editorial, trustworthy voice while Karla's clean shapes keep body text easy to scan on screens. Karla ships in 7 weights, so you can build captions, buttons and emphasis without adding another family.
HSource Serif 4
Source Serif 4 is a free serif typeface designed by Frank Grießhammer, added to Google Fonts in 2021. It comes in 8 weights with matching italics, and is a variable font with optical size and weight axes.
More pairings for Source Serif 4 →BKarla
Karla is a free sans serif typeface designed by Jonny Pinhorn, added to Google Fonts in 2012. It comes in 7 weights with matching italics, and is a variable font with a weight axis.
More pairings for Karla →Use this pairing on your website
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@700&family=Karla:wght@400;700&display=swap" rel="stylesheet">h1, h2, h3 {
font-family: 'Source Serif 4', serif;
font-weight: 700;
}
body {
font-family: 'Karla', sans-serif;
font-weight: 400;
line-height: 1.6;
}More pairings with Source Serif 4
Typography sets the tone before a single word is read. A good pairing feels like one voice.
An expressive grotesque headline with a highly readable modern serif body.
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A modern, slightly condensed sans for UI and headings over a refined text serif.
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A geometric tech sans with a serif that keeps long text comfortable.
More pairings with Karla
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A screen-first serif with literary charm, grounded by Karla’s quirky grotesque.
Typography sets the tone before a single word is read. A good pairing feels like one voice.
Softly rounded corners on headings with a quirky grotesque for body text.
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A classic contrast: Playfair Display's serifs give headlines an editorial, trustworthy voice while Karla's clean shapes keep body text easy to scan on screens.
Frequently asked questions
Do Source Serif 4 and Karla go well together?
A classic contrast: Source Serif 4's serifs give headlines an editorial, trustworthy voice while Karla's clean shapes keep body text easy to scan on screens. Karla ships in 7 weights, so you can build captions, buttons and emphasis without adding another family.
Which font should be used for headings?
Use Source Serif 4 for headings at weight 700, and Karla for body text at weight 400. You can swap them in the pairing tool to compare.
Are Source Serif 4 and Karla free?
Yes — both are open-source fonts on Google Fonts and free for personal and commercial use.