Created
December 30, 2011 16:14
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Calculate contrast from two RGB colors.
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| function contrast(c1, c2) { | |
| v1 = Math.min(Math.min(c1.r, c1.g),c1.b) + Math.max(Math.max(c1.r, c1.g),c1.b) / 2; | |
| v2 = Math.min(Math.min(c2.r, c2.g),c2.b) + Math.max(Math.max(c2.r, c2.g),c2.b) / 2; | |
| return Math.abs(v1-v2); | |
| }; |
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| contrast({r:0, g:0, b:0},// black | |
| {r:128, g:83, b:83}// light-brown-red | |
| ); | |
| // 147 |
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