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File: engine/modules/contrib/foundation/source/scss/util/_color.scss

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File: engine/modules/contrib/foundation/source/scss/util/_color.scss
Role: Auxiliary data
Content type: text/plain
Description: Auxiliary data
Class: Quanta CMS
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Date: 5 years ago
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// Foundation for Sites by ZURB // foundation.zurb.com // Licensed under MIT Open Source @import 'math'; //// /// @group functions //// /// Checks the luminance of `$color`. /// /// @param {Color} $color - Color to check the luminance of. /// /// @returns {Number} The luminance of `$color`. @function color-luminance($color) { // Adapted from: https://github.com/LeaVerou/contrast-ratio/blob/gh-pages/color.js // Formula: http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef $rgba: red($color), green($color), blue($color); $rgba2: (); @for $i from 1 through 3 { $rgb: nth($rgba, $i); $rgb: $rgb / 255; $rgb: if($rgb < 0.03928, $rgb / 12.92, pow(($rgb + 0.055) / 1.055, 2.4)); $rgba2: append($rgba2, $rgb); } @return 0.2126 * nth($rgba2, 1) + 0.7152 * nth($rgba2, 2) + 0.0722 * nth($rgba2, 3); } /// Checks the contrast ratio of two colors. /// /// @param {Color} $color1 - First color to compare. /// @param {Color} $color2 - Second color to compare. /// /// @returns {Number} The contrast ratio of the compared colors. @function color-contrast($color1, $color2) { // Adapted from: https://github.com/LeaVerou/contrast-ratio/blob/gh-pages/color.js // Formula: http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef $luminance1: color-luminance($color1) + 0.05; $luminance2: color-luminance($color2) + 0.05; $ratio: $luminance1 / $luminance2; @if $luminance2 > $luminance1 { $ratio: 1 / $ratio; } $ratio: round($ratio * 10) / 10; @return $ratio; } /// Checks the luminance of `$base`, and returns the color from `$colors` (list of colors) that has the most contrast. /// /// @param {Color} $color1 - First color to compare. /// @param {Color} $color2 - Second color to compare. /// /// @returns {Number} The contrast ratio of the compared colors. @function color-pick-contrast($base, $colors: ($white, $black), $tolerance: 0) { $contrast: color-contrast($base, nth($colors, 1)); $best: nth($colors, 1); @for $i from 2 through length($colors) { $current-contrast: color-contrast($base, nth($colors, $i)); @if ($current-contrast - $contrast > $tolerance) { $contrast: color-contrast($base, nth($colors, $i)); $best: nth($colors, $i); } } @if ($contrast < 3) { @warn "Contrast ratio of #{$best} on #{$base} is pretty bad, just #{$contrast}"; } @return $best; } /// Scales a color to be darker if it's light, or lighter if it's dark. Use this function to tint a color appropriate to its lightness. /// /// @param {Color} $color - Color to scale. /// @param {Percentage} $scale [5%] - Amount to scale up or down. /// @param {Percentage} $threshold [40%] - Threshold of lightness to check against. /// /// @returns {Color} A scaled color. @function smart-scale($color, $scale: 5%, $threshold: 40%) { @if lightness($color) > $threshold { $scale: -$scale; } @return scale-color($color, $lightness: $scale); } /// Get color from foundation-palette /// /// @param {key} color key from foundation-palette /// /// @returns {Color} color from foundation-palette @function get-color($key) { @if map-has-key($foundation-palette, $key) { @return map-get($foundation-palette, $key); } @else { @error 'given $key is not available in $foundation-palette'; } } /// Transfers the colors in the `$foundation-palette`map into variables, such as `$primary-color` and `$secondary-color`. Call this mixin below the Global section of your settings file to properly migrate your codebase. @mixin add-foundation-colors() { @if map-has-key($foundation-palette, primary) { $primary-color: map-get($foundation-palette, primary) !global; } @if map-has-key($foundation-palette, secondary) { $secondary-color: map-get($foundation-palette, secondary) !global; } @if map-has-key($foundation-palette, success) { $success-color: map-get($foundation-palette, success) !global; } @if map-has-key($foundation-palette, warning) { $warning-color: map-get($foundation-palette, warning) !global; } @if map-has-key($foundation-palette, alert) { $alert-color: map-get($foundation-palette, alert) !global; } }