How to determine a dark picture or bright?

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webinar · Answer 1 · 2019-04-18T19:54:10+0000

rgb - average color of the image (or desired area):

getContrastLum function(rgb) { var luminance = 0.2126 * rgb[0] + 0.7152 * rgb[1] + 0.0722 * rgb[2]; return luminance < 110 ? 'f0f0f0' : '020202'; }