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Sass function and mixin for setting contrasting background and foreground colors
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$contrasted-default-dark: #000; | |
$contrasted-default-light: #fff; | |
@mixin contrasted($bg, $dark:$contrasted-default-dark, $light:$contrasted-default-light){ | |
background-color: $bg; | |
color: get_contrast_yiq($bg, $dark, $light); | |
} |
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module Sass::Script::Functions | |
def get_contrast_yiq(color, dark = Sass::Script::Color.new([0,0,0]), light = Sass::Script::Color.new([255,255,255])) | |
yiq = ( (color.red*299) + (color.green*587) + (color.blue*114) ) / 1000; | |
yiq >= 128 ? dark : light | |
end | |
end |
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@import "contrast_mixin"; | |
body { | |
padding: 20px; | |
font: bold 16px/24px Helvetica, Arial, sans-serif; | |
} | |
div { | |
padding: 10px; | |
margin-bottom: 10px; | |
&.a { @include contrasted(#ef4444); } | |
&.b { @include contrasted(#faa31b); } | |
&.c { @include contrasted(#fff000); } | |
&.d { @include contrasted(#82c341); } | |
&.e { @include contrasted(#009f75); } | |
&.f { @include contrasted(#88c6ed); } | |
&.g { @include contrasted(#394ba0); } | |
&.h { @include contrasted(#d54799); } | |
} |
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