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Check your channel's brand colours for readable text: contrast ratios for thumbnails, captions…
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What this guide covers
For creators and small teams choosing colours for thumbnail lettering, captions and banner text. You end up with a brand-colour sheet and a table of the text/background pairs you will use, each with its measured contrast ratio and a pass or fail against WCAG's 4.5:1 and 3:1 thresholds. It compares flat colours only and uses WCAG as a yardstick rather than a platform rule, so check real designs on a phone.
More about this guide
Guide ID: art_01M77EFSC5EAZ9MNAJG58J9PCA
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Guide title
Check your channel's brand colours for readable text: contrast ratios for thumbnails, captions and banners
Coverage
For creators and small teams choosing colours for thumbnail lettering, captions and banner text. You end up with a brand-colour sheet and a table of the text/background pairs you will use, each with its measured contrast ratio and a pass or fail against WCAG's 4.5:1 and 3:1 thresholds. It compares flat colours only and uses WCAG as a yardstick rather than a platform rule, so check real designs on a phone.
Example
A generated four-colour palette measured 15.974:1 for white on navy and 7.900:1 for amber on navy, while amber on white failed at 2.022:1.
Useful starting points
- Use amber-style accents only on the dark colour they were checked against.
- A ratio of 4.478:1 fails the 4.5:1 threshold; it is not rounded.
- Put text over photos on a solid backing shape, then check that pair.
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