Created
February 3, 2020 17:16
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| function calculateContrast(foreground, alpha, backgound) { | |
| if (alpha < 1) { | |
| foreground = overlay(foreground, alpha, backgound) | |
| } | |
| const foregroundLuminance = calculateLuminance(foreground) + 0.05 | |
| const backgroundLuminance = calculateLuminance(backgound) + 0.05 | |
| let contrast = foregroundLuminance / backgroundLuminance | |
| if (backgroundLuminance > foregroundLuminance) { | |
| contrast = 1 / contrast | |
| } | |
| //... |
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