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// When color definition differs for dark and light variant,
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// it gets @if ed depending on $variant
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@import 'color-palette';
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@function gtkalpha($c, $a) {
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@return unquote("alpha(#{$c}, #{$a})");
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}
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@function on($color, $state: 'primary') {
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// Allow 'light' or 'dark' to $color
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@if ($color == 'light') { $color: white; }
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@if ($color == 'dark') { $color: black; }
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// Calculate color brightness according to https://www.w3.org/TR/AERT/#color-contrast
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$brightness: (red($color) * 299 + green($color) * 587 + blue($color) * 114) / 1000;
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@if ($brightness >= 128) {
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@if ($state == 'primary') { @return rgba(black, 0.87); }
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@if ($state == 'secondary') { @return rgba(black, 0.54); }
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@if ($state == 'disabled') { @return rgba(black, 0.38); }
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@if ($state == 'secondary-disabled') { @return rgba(black, 0.26); }
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@if ($state == 'track') { @return rgba(black, 0.26); }
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@if ($state == 'track-disabled') { @return rgba(black, 0.12); }
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@if ($state == 'divider') { @return rgba(black, 0.12); }
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@if ($state == 'fill') { @return rgba(black, 0.04); }
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} @else {
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@if ($state == 'primary') { @return white; }
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@if ($state == 'secondary') { @return rgba(white, 0.7); }
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@if ($state == 'disabled') { @return rgba(white, 0.5); }
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@if ($state == 'secondary-disabled') { @return rgba(white, 0.3); }
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@if ($state == 'track') { @return rgba(white, 0.3); }
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@if ($state == 'track-disabled') { @return rgba(white, 0.12); }
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@if ($state == 'divider') { @return rgba(white, 0.12); }
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@if ($state == 'fill') { @return rgba(white, 0.04); }
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}
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}
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@function highlight($color) {
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@if (lightness($color) >= 80%) { @return rgba(white, 0.4); }
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@else if (lightness($color) >= 40%) { @return rgba(white, 0.2); }
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@else { @return rgba(white, 0.1); }
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}
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//
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// Basic colors
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//
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$blue: #4285F4;
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$green: #34A853;
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$yellow: #FBBC05;
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$red: #EA4335;
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$primary-dark: $blue;
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$primary-light: #7BAAF7;
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$primary: if($variant == 'light', $primary-dark, $primary-light);
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$background: if($variant == 'light', #F2F2F2, #282828);
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$surface: if($variant == 'light', #FFFFFF, #424242);
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$base: if($variant == 'light', #FFFFFF, #303030); // semi-surface with no elevation
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$base-alt: if($variant == 'light', #FAFAFA, #2C2C2C);
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$os-background: #303030;
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$tooltip: rgba(#616161, 0.9);
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$scrim: rgba(black, 0.6);
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$scrim-alt: rgba(black, 0.3);
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$scrim-inverse: rgba(white, 0.1);
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$titlebar: if($topbar == 'dark', #383838, #E0E0E0);
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$titlebar-backdrop: if($topbar == 'dark', #303030, #D6D6D6);
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$panel: if($topbar == 'dark', #212121, $scrim);
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$panel-solid: if($topbar == 'dark', #212121, #CCCCCC); // for Unity panel which doesn't allow translucent colors
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//
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// Misc colors
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//
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$link: $primary;
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$link-visited: $purple-a200;
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$warning: $yellow;
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$error: $red;
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$success: $green;
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$suggested: $primary-dark;
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$destructive: $error;
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$frame: if($variant == 'light', rgba(black, 0.12), rgba(black, 0.26)); // instead of shadows
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$border-alt: rgba(black, 0.26); // darker border color for Chrome and Firefox
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$titlebar-indicator: if($topbar == 'dark', currentColor, $primary);
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//
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// Overlay state colors
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//
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$overlay-hover: gtkalpha(currentColor, 0.08);
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$overlay-focus: gtkalpha(currentColor, 0.08);
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$overlay-focus-hover: gtkalpha(currentColor, 0.16);
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$overlay-active: gtkalpha(currentColor, 0.12);
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$overlay-checked: gtkalpha(currentColor, 0.12);
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$overlay-selected: rgba($primary, 0.24);
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//
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// Text and derivative colors
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//
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$text: on($background);
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$text-secondary: on($background, secondary);
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$text-disabled: on($background, disabled);
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$text-secondary-disabled: on($background, secondary-disabled);
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$track: on($background, track);
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$track-disabled: on($background, track-disabled);
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$divider: on($background, divider);
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$fill: on($background, fill);
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$titlebar-text: on($titlebar);
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$titlebar-text-secondary: on($titlebar, secondary);
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$titlebar-text-disabled: on($titlebar, disabled);
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$titlebar-text-secondary-disabled: on($titlebar, secondary-disabled);
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$titlebar-track: on($titlebar, track);
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$titlebar-track-disabled: on($titlebar, track-disabled);
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$titlebar-divider: on($titlebar, divider);
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$titlebar-fill: on($titlebar, fill);
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// workaround for GTK3 @placeholder_text_color which doesn't allow translucent colors
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$placeholder_text_color: if($variant == 'light', $grey-600, mix($white, $base, percentage(0.7)));
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