Rafael Viveros rafael25
w3core
/ brightnessByColor.js
Created
December 8, 2016 08:52
Calculate brightness value by RGB or HEX color
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| /** | |
| * Calculate brightness value by RGB or HEX color. | |
| * @param color (String) The color value in RGB or HEX (for example: #000000 || #000 || rgb(0,0,0) || rgba(0,0,0,0)) | |
| * @returns (Number) The brightness value (dark) 0 ... 255 (light) | |
| */ | |
| function brightnessByColor (color) { | |
| var color = "" + color, isHEX = color.indexOf("#") == 0, isRGB = color.indexOf("rgb") == 0; | |
| if (isHEX) { | |
| var m = color.substr(1).match(color.length == 7 ? /(\S{2})/g : /(\S{1})/g); | |
| if (m) var r = parseInt(m[0], 16), g = parseInt(m[1], 16), b = parseInt(m[2], 16); |