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SASS/SCSS Coloury
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <a class="button button--gold">Pushy</a> | |
| <a class="button button--crimson">Hazey</a> | |
| <hr> | |
| <a class="button button--gold">Gold</a> | |
| <a class="button button--crimson">Crimson</a> | |
| <a class="button button--indigo">Indigo</a> | |
| <a class="button button--yellowgreen">Yellowgreen</a> | |
| <a class="button button--deepskyblue">Deepskyblue</a> | |
| </body> | |
| </html> |
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| /** | |
| * Compute the brightness of a color. | |
| * | |
| * @param color $color | |
| * @see http://compass-style.org/reference/compass/utilities/color/brightness/ | |
| */ | |
| @function brightness($color) { | |
| @return (red($color) * 0.299 + green($color) * 0.587 + blue($color) * 0.114) / 255 * 100%; | |
| } | |
| /* | |
| * Calculates the sRGB luma of a colour. | |
| * | |
| * Math nicked from a great Thoughtbot article by Reda Lemeden: | |
| * http://robots.thoughtbot.com/closer-look-color-lightness | |
| */ | |
| @function luma($c) { | |
| $-local-red: red(rgba($c, 1.0)); | |
| $-local-green: green(rgba($c, 1.0)); | |
| $-local-blue: blue(rgba($c, 1.0)); | |
| @return (0.2126 * $-local-red + | |
| 0.7152 * $-local-green + | |
| 0.0722 * $-local-blue) / 255; | |
| } | |
| /** | |
| * Picks a colour from two options based on which one is more visible | |
| * on the given background colour. | |
| * | |
| * @param color $bg Elements background color | |
| * @param color $c1 Primary color | |
| * @param color $c2 Secondary color | |
| * @example pick-visible-color($bg-color, $color-1, $color-2); | |
| * @see https://lnikki.la/articles/sass-better-colour-based-on-brightness/ | |
| */ | |
| @function pick-visible-color($bg, $c1, $c2) { | |
| $bg-luma: luma($bg); | |
| $c1-luma: luma($c1); | |
| $c2-luma: luma($c2); | |
| $c1-diff: abs($bg-luma - $c1-luma); | |
| $c2-diff: abs($bg-luma - $c2-luma); | |
| @return if($c1-diff > $c2-diff, $c1, $c2); | |
| } | |
| @function pick-scaled-color($color, $scale: 65%) { | |
| @return pick-visible-color($color, | |
| scale-color($color, $lightness: $scale), | |
| scale-color($color, $lightness: -$scale) | |
| ); | |
| } | |
| // variables/_colors.scss | |
| $colors: gold, crimson, indigo, yellowgreen, deepskyblue; | |
| // elements/_buttons.scss | |
| .button { | |
| display: inline-block; | |
| padding: 0.5em; | |
| @each $color in $colors { | |
| &--#{$color} { | |
| color: pick-scaled-color($color); | |
| background-color: $color; | |
| } | |
| } | |
| } | |
| // index.scss | |
| body { | |
| padding: 0; | |
| } |
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