_BevelShadowColor
rgb_color _BevelShadowColor(const rgb_color& base,
rgb_color bevelShadowColor = _BevelShadowColor(base, flags);
rgb_color _BevelShadowColor(const rgb_color& base, uint32 flags);
rgb_color bevelShadowColor = _BevelShadowColor(base, flags);
rgb_color bevelShadowColor = _BevelShadowColor(base, flags);