static void slider_color_TYPE_HUE(synfig::Color &color, float amount);
static void slider_color_TYPE_SAT(synfig::Color &color, float amount);
static void slider_color_TYPE_A(synfig::Color &color, float amount);
static void slider_color_TYPE_HUE(synfig::Color &color, float amount);
static void slider_color_TYPE_SAT(synfig::Color &color, float amount);
static void slider_color_TYPE_A(synfig::Color &color, float amount);