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Diffstat (limited to 'scripts/theme-studio/app-util.js')
| -rw-r--r-- | scripts/theme-studio/app-util.js | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/scripts/theme-studio/app-util.js b/scripts/theme-studio/app-util.js index e3f76dd88..774553012 100644 --- a/scripts/theme-studio/app-util.js +++ b/scripts/theme-studio/app-util.js @@ -17,4 +17,14 @@ function ratingColor(r){return r>=7?'#5d9b86':r>=4.5?'#a9b2bb':'#cb6b4d';} // Pick black or white text for a background hex, by WCAG relative luminance. function textOn(h){const L=rl(h);return ((L+0.05)/0.05)>(1.05/(L+0.05))?'#000':'#fff';} -export { normHex, ratingColor, textOn }; +// Hover text for a contrast ratio. The number's color already encodes the tier +// (ratingColor: green AAA, grey AA, red fail), so the cell drops the PASS/FAIL +// word and this explains the color on hover. +function contrastTitle(r){ + const n=r.toFixed(1)+':1'; + if(r>=7) return n+' (green): passes WCAG AA and AAA'; + if(r>=4.5) return n+' (grey): passes WCAG AA, not AAA'; + return n+' (red): fails WCAG AA'; +} + +export { normHex, ratingColor, textOn, contrastTitle }; |