The term 'SUNROOF COLORING' refers to the process of tinting a sunroof with a colored film. This is done to reduce the amount of sunlight that enters the vehicle, as well as to provide privacy and aesthetic appeal. The crossword solution for this term is 'TINT', which is a type of dye or pigment used to color materials. Tinting a sunroof is a popular way to customize a vehicle and can be done in a variety of colors.