Truecolor is a means to specify a color explicitly with RGB values rather than pointing to an entry in the figure colormap. Truecolor generally provides a greater range of colors than can be defined in a colormap.
Using truecolor eliminates the mapping of data to colormap entries. On the other hand, you cannot change the coloring of the patch without redefining the color data (as opposed to just changing the colormap).
You can use truecolor on computers that do not have true color (24-bit) displays. In this case, MATLAB uses a special colormap designed to produce results that are as close as possible with the limited number of colors available. Properties control how MATLAB uses color on pseudocolor machines.
|Indexed Color Data||Interpolating in Indexed Color Versus Truecolor|