tech · classic

IBM Plex Serif and IBM Plex Sans font pairing

Engineered together — a dependable choice for docs, products and dashboards.

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Issue 07 · Field notes
Make something people love

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 IBM Plex Sans, while the headline uses IBM Plex Serif. Numbers like 0123456789, punctuation “quotes” — and ampersands & — reveal a lot about how two typefaces get along.

Contrast, then harmony

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: IBM Plex Serif's serifs give headlines an editorial, trustworthy voice while IBM Plex Sans's clean shapes keep body text easy to scan on screens. IBM Plex Sans ships in 7 weights, so you can build captions, buttons and emphasis without adding another family.

HIBM Plex Serif

IBM Plex Serif is a free serif typeface designed by Mike Abbink and Bold Monday, added to Google Fonts in 2018. It comes in 7 weights with matching italics.

More pairings for IBM Plex Serif →

BIBM Plex Sans

IBM Plex Sans is a free sans serif typeface designed by Mike Abbink and Bold Monday, added to Google Fonts in 2018. It comes in 7 weights with matching italics, and is a variable font with width and weight axes.

More pairings for IBM Plex Sans →

Use this pairing on your website

HTML — paste in <head>
<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=IBM+Plex+Serif:wght@700&family=IBM+Plex+Sans:wght@400;700&display=swap" rel="stylesheet">
CSS
h1, h2, h3 {
  font-family: 'IBM Plex Serif', serif;
  font-weight: 700;
}

body {
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 400;
  line-height: 1.6;
}

More pairings with IBM Plex Serif

The art of saying less

Typography sets the tone before a single word is read. A good pairing feels like one voice.

HIBM Plex SerifBOswaldeditorial→

A classic contrast: IBM Plex Serif's serifs give headlines an editorial, trustworthy voice while Oswald's clean shapes keep body text easy to scan on screens.

Good things take time

Typography sets the tone before a single word is read. A good pairing feels like one voice.

HIBM Plex SerifBOpen Sanseditorial→

A classic contrast: IBM Plex Serif's serifs give headlines an editorial, trustworthy voice while Open Sans's clean shapes keep body text easy to scan on screens.

The art of saying less

Typography sets the tone before a single word is read. A good pairing feels like one voice.

HIBM Plex SerifBMulisheditorial→

A classic contrast: IBM Plex Serif's serifs give headlines an editorial, trustworthy voice while Mulish's clean shapes keep body text easy to scan on screens.

More pairings with IBM Plex Sans

The art of saying less

Typography sets the tone before a single word is read. A good pairing feels like one voice.

HLibre BaskervilleBIBM Plex Sanseditorial→

A classic contrast: Libre Baskerville's serifs give headlines an editorial, trustworthy voice while IBM Plex Sans's clean shapes keep body text easy to scan on screens.

A field guide to good ideas

Typography sets the tone before a single word is read. A good pairing feels like one voice.

HSpectralBIBM Plex Sanseditorial→

A classic contrast: Spectral's serifs give headlines an editorial, trustworthy voice while IBM Plex Sans's clean shapes keep body text easy to scan on screens.

The future of small business

Typography sets the tone before a single word is read. A good pairing feels like one voice.

HCinzelBIBM Plex Sanseditorial→

A classic contrast: Cinzel's serifs give headlines an editorial, trustworthy voice while IBM Plex Sans's clean shapes keep body text easy to scan on screens.

Frequently asked questions

Do IBM Plex Serif and IBM Plex Sans go well together?

A classic contrast: IBM Plex Serif's serifs give headlines an editorial, trustworthy voice while IBM Plex Sans's clean shapes keep body text easy to scan on screens. IBM Plex Sans ships in 7 weights, so you can build captions, buttons and emphasis without adding another family.

Which font should be used for headings?

Use IBM Plex Serif for headings at weight 700, and IBM Plex Sans for body text at weight 400. You can swap them in the pairing tool to compare.

Are IBM Plex Serif and IBM Plex Sans free?

Yes — both are open-source fonts on Google Fonts and free for personal and commercial use.