A practical tool for your next Short
Caption Colour Contrast Checker
Check the WCAG contrast ratio between a caption colour and a solid background.
Your inputs
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Your result
This checks a static colour pair using WCAG contrast. It does not check font size, motion, compression, UI overlap or overall accessibility. Review the finished video too.
WCAG contrast guidance: https://www.w3.org/WAI/WCAG22/Understanding/contrast-minimum.html · reviewed 3 October 2026.
Make The Result Useful
Choose the actual rendered foreground and the solid colour directly behind it. The ratio compares their relative luminance. A video changes over time, so repeat the check on bright and dark shots and inspect the final caption size. WCAG defines different thresholds for normal and large text.
This checks a static colour pair using WCAG contrast. It does not check font size, motion, compression, UI overlap or overall accessibility. Review the finished video too.