@mcdevsl/superset-ui
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JavaScript
export const LUMINANCE_RED_WEIGHT = 0.2126;
export const LUMINANCE_GREEN_WEIGHT = 0.7152;
export const LUMINANCE_BLUE_WEIGHT = 0.0722;
export default function luminanceFromRGB(r, g, b) {
// Formula: https://en.wikipedia.org/wiki/Relative_luminance
return LUMINANCE_RED_WEIGHT * r + LUMINANCE_GREEN_WEIGHT * g + LUMINANCE_BLUE_WEIGHT * b;
}