RANK #06 84% MATCH

Open Sans × Source Serif 4

sans-serif  +  Body

A clean Open Sans headline over Source Serif's modern transitional body is a composed, professional system — the neutral sans leads, the serif gives the reading text warmth and authority, and both stay restrained enough...

Headings + Body Google Fonts Free
Open in Studio Copy CSS
Match scores

How Open Sans and Source Serif 4 score across four checks — class contrast, role clarity, x-height harmony and mood affinity. Higher is better.

COMPOSITE MATCH
84 /100
Reliable choice
Class contrast 88
Role clarity 82
X-height harmony 82
Mood affinity 82
WHY IT WORKS
Structure meets readability

A clean Open Sans headline over Source Serif's modern transitional body is a composed, professional system — the neutral sans leads, the serif gives the reading text warmth and authority, and both stay restrained enough to feel coherent.

Where it shines

Documentation, reports and corporate content wanting a modern sans headline over a clean serif body.

Where to be careful

Both are restrained — lean on Open Sans weight for the headline so the hierarchy stays obvious.

THE TYPEFACES
Meet the pair
Ag HEADING
Open Sans
sans-serif · Steve Matteson · 2011
ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789 & ?!
WEIGHTS
Light Regular Medium SemiBold Bold ExtraBold
BEST FOR Headlines, labels, UI
Ag BODY
Source Serif 4
Frank Grießhammer
ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789 & ?!
BEST FOR Body text, quotes, long reads
GET THE PAIR
Drop it into your project

Add the fonts, then two rules — Open Sans for headings, Source Serif 4 for everything you read.

index.html
<link rel="preconnect" href="https://fonts.googleapis.com">
<link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@500;700&family=Source+Serif+4:wght@400;500&display=swap" rel="stylesheet">
styles.css
h1, h2, h3 {
  font-family: "Open Sans", sans-serif;
  font-weight: 700;
  letter-spacing: -0.01em;
}

body, p {
  font-family: "Source Serif 4", serif;
  font-weight: 400;
  line-height: 1.7;
}
MORE PAIRINGS
Other ways to use Open Sans
All Open Sans pairings
Ag × Ag
Open Sans + Open Sans

Open Sans is the neutral humanist workhorse of the web, and under Playfair it does exactly what a body font should — disappear. Close tall x...

88% match Rank #01
Ag × Ag
Open Sans + Lora

Lora's warm, moderate-contrast serif headings give a literary feel over Open Sans's clean humanist body. Softer than Playfair, Lora makes a...

87% match Rank #02
Ag × Ag
Open Sans + Cormorant

Cormorant is a high-contrast display serif with real elegance, and over Open Sans's neutral body it creates a refined, editorial hierarchy —...

86% match Rank #03
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