ArdourCanvas::Color color (const std::string&, bool* failed = 0) const;
ArdourCanvas::Color color_mod (std::string const & color, std::string const & modifier) const;
+ ArdourCanvas::Color color_mod (const ArdourCanvas::Color& color, std::string const & modifier) const;
ArdourCanvas::HSV color_hsv (const std::string&) const;
ArdourCanvas::SVAModifier modifier (const std::string&) const;