Chroma is also known as saturation or intensity, and refers to how much of the same hue is present in a color. It refers to the "brightness" of a color. When a primary color is added to, or substracted from itself, its chroma is changed. A color is fully saturated when no other color, no white or no black is added to it. The primary color blue becomes peacock blue if its chroma is increased, while it becomes navy when its chroma is reduced.