Answer: shading

AnswerCrossword Clue
SHADINGSlight variation of color
SHADINGArtistic effect.
SHADINGColoring
shadingA very slight variation, typically in color or meaning
shadingThe darkening or coloring of an illustration or diagram with parallel lines or a block of color
shadingA layer of paint or material used to provide shade, esp. for plants
shadingprotection against light or heat