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Contents
// Computes the "brightness" of a color
//
// Brightness is similiar to lightness in HSL but more closely approximates
// how humans perceive the intensity of the different RGB components of
// a color. Brightness is sometimes called luminance.
//
// Returns a number between 0% and 100%, where 100% is fully bright
// (white) and 0% is fully dark (black) for color values.
//
// For numbers and percentages it returns the same value to be used
// in `@include filter(brightness(1.1))`.
@function brightness($color) {
@if type-of($color) == color {
@return ((red($color) * .299) + (green($color) * .587) + (blue($color) * .114)) / 255 * 100%;
}
@else {
@return unquote("brightness(#{$color})");
}
}
Version data entries
12 entries across 12 versions & 3 rubygems