al_color_lch(3) al_color_lch(3) NAME al_color_lch - Allegro 5 API SYNOPSIS #include ALLEGRO_COLOR al_color_lch(float l, float c, float h) DESCRIPTION Return an ALLEGRO_COLOR(3) structure from CIE LCH values. LCH colors are very similar to HSL, with the same meaning of L and H and C corresponding to S. However LCH is more visually uniform. Furthermore, this function expects the angle for H in radians and not in degree. The CIE LCH color space is a cylindrical representation of the L*a*b* color space. The L component is the same and C and H are computed like this: C = sqrt(a * a + b * b) H = atan2(b, a) SINCE 5.2.3 SEE ALSO al_color_lch_to_rgb(3), al_color_rgb_to_lch(3) Allegro reference manual al_color_lch(3)