How to check text contrast on a YouTube cover
Color contrast helps diagnose why a word vanishes. The ratio is most useful when you measure the colors that actually touch on the cover.
Color contrast helps diagnose why a word vanishes. The ratio is most useful when you measure the colors that actually touch on the cover.
Measure local background
On a photo, sample beneath each critical word. White letters over pale hair can fail even when the average frame looks dark. For a textured area, use the weakest patch under the word as the first thing to fix.
Read the ratio in context
WCAG uses 4.5:1 for ordinary text as an accessibility baseline. A thumbnail is also affected by scale, resampling and busy detail. Treat the number as a check, then look at the actual image without zooming.
Fix one variable
Try moving the word, changing the ink, or adding a solid backing. Keep the version that stays legible with the least interference. If a black bar hides the evidence in the picture, move the text before making the bar larger.
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Crop a thumbnail without cutting the subject
A crop should give the subject a clearer role. The best rectangle depends on the story you want to show, the text you need, and where the cover will be viewed.
Make your YouTube title and thumbnail work together
A good pair gives the viewer two pieces of the same promise. Use the image to show evidence and the title to explain why it matters.
Build a thumbnail color palette from real footage
A usable palette assigns colors to jobs. Pick a background, a reading color, and one accent that still stands out after export.