Masks in image editing software are a way of protecting specific areas of an image, just as we would use masking tape when painting our house. A mask consists of a grayscale channel, called an alpha channel and is often displayed as a ruby overlay so the underlying image can be seen through the mask. The darkest areas of a mask are the areas most protected and the white areas are unprotected. Shades of gray represent areas of partial protection that corresponds with the level of gray.
Color Wise Mask box!!!!