ESPTerm web interface submodule, separated to make testing and development easier
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espterm-front-end/sass/lib/bourbon/functions/_is-light.scss

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@charset "UTF-8";
/// Programatically determines whether a color is light or dark.
///
/// @link http://robots.thoughtbot.com/closer-look-color-lightness
///
/// @param {Color (Hex)} $color
///
/// @example scss - Usage
/// is-light($color)
///
/// @return {Bool}
@function is-light($hex-color) {
$-local-red: red(rgba($hex-color, 1));
$-local-green: green(rgba($hex-color, 1));
$-local-blue: blue(rgba($hex-color, 1));
$-local-lightness: ($-local-red * 0.2126 + $-local-green * 0.7152 + $-local-blue * 0.0722) / 255;
@return $-local-lightness > 0.6;
}