Creates a new color object that has the same color space and component values as the receiver, but the specified alpha component.
The opacity value of the new
NSColor object. If the receiver’s color space doesn’t include an alpha component, the receiver is returned.
A subclass with explicit opacity components should override this method to return a color with the specified alpha.
Transforming an Existing Color Object
Creates a new color object representing the color of the receiver in the specified color space.
Creates a new color object that represents a blend between the current color and the highlight color.
Creates a new color object that represents a blend between the current color and the shadow color.
Creates a new color object whose color is the same as the receiver’s, except that the new
NSColor is in the specified color space.