_color_blend($img, $hex1, $hex2, $alpha) Blends two hex colors and returns the GD color.

color_get_info($theme) Retrieves the Color module information for a particular theme.

_color_unpack($hex, $normalize = FALSE) Converts a hex color into an RGB triplet. File

color_scheme_form_validate($form, FormStateInterface $form_state) Form validation handler for

public ColorConfigCacheInv

_color_hue2rgb($m1, $m2, $h) Helper function for

public static ColorConfigC

Install, update and uninstall functions for the color module. File core/modules/color/color.install

_color_render_images($theme, &$info, &$paths, $palette) Renders images that match a given palette.

_color_save_stylesheet($file, $style, &$paths) Saves the rewritten stylesheet to disk.