| This might be easier to visulaize if you move it form RGB color space to Hue, Saturation, and Value colorspace. That way you can set thresholds for each dimension rather than having to remember that green is 30% stronger in our perception of color and that blue is going to be inherently darker than red in terms of color perception.
EDIT: Just for reference Hue is what actual color you see, such as red or magenta, or yellow. Saturation is the amount of color in it a saturation of zero is a grayscale image whereas a full saturation would yield pure color. Value represents how light or dark the color is. |