color_form_system_theme_settings_alter(&$form, FormStateInterface $form_state) Implements
_color_shift($given, $ref1, $ref2, $target) Shifts a given color, using a reference pair and a target blend
color_help($route_name, RouteMatchInterface $route_match) Implements
_color_rgb2hsl($rgb) Converts an RGB triplet to HSL. File
color_block_view_pre_render(array $build) #pre_render callback: Sets color preset logo.
template_preprocess_color_scheme_form(&$variables) Prepares variables for color scheme form templates.
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