Values for colorMode are ColorMode.normal (no effect) and ColorMode.random. A value of random applies a random linear scale to the base as follows. To achieve a truly random selection of colors, specify a base of white (ffffffff). If you specify a single color component (for example, a value of ff0000ff for red), random color values for that one component (red) will be selected. In this case, the values would range from 00 (black) to ff (full red). If you specify values for two or for all three color components, a random linear scale is applied to each color component, with results ranging from black to the maximum values specified for each component. The opacity of a color comes from the alpha component of and is never randomized.