Added new design

[wolnelektury.git] / src / wolnelektury / static / 2022 / styles / utils / bourbon / utilities / _contrast-ratio.scss

diff --git a/src/wolnelektury/static/2022/styles/utils/bourbon/utilities/_contrast-ratio.scss b/src/wolnelektury/static/2022/styles/utils/bourbon/utilities/_contrast-ratio.scss
new file mode 100644 (file)
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+++ b/src/wolnelektury/static/2022/styles/utils/bourbon/utilities/_contrast-ratio.scss
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+@charset "UTF-8";
+
+/// Programatically determines the contrast ratio between two colors.
+///
+/// Note that the alpha channel is ignored.
+///
+/// @link https://goo.gl/54htLV
+///
+/// @argument {color (hex)} $color-1
+///
+/// @argument {color (hex)} $color-2
+///
+/// @return {number (1-21)}
+///
+/// @example scss
+///   _contrast-ratio(black, white)
+///
+/// @require {function} _lightness
+///
+/// @access private
+
+@function _contrast-ratio($color-1, $color-2) {
+  $-local-lightness-1: _lightness($color-1) + 0.05;
+  $-local-lightness-2: _lightness($color-2) + 0.05;
+
+  @if $-local-lightness-1 > $-local-lightness-2 {
+    @return $-local-lightness-1 / $-local-lightness-2;
+  } @else {
+    @return $-local-lightness-2 / $-local-lightness-1;
+  }
+}