0.455--0.492 green 0.492--0.577 yellow 0.577--0.597 orange 0.597--0.622 red 0.622--0.780 __________________________________________________________________________ Reference: HZ-56 Note: There are no distinct boundaries between color . The eye looking at white light dispersed into a spectrum just sees the color gradually change. The boundaries given are conventional and approximate what people would ordinarily judge to be the