Table 1.

Colorimetric values of color stimuli used

Color	Hex triplet	sRGB [r,g,b]	X	Y	Z	L*	C*	h*
Violet	#7F00FF	(127, 0, 255)	26.79	11.73	95.44	40.79	127.09	311.63
Indigo	#3F00FF	(63, 0, 255)	20.09	08.28	95.13	34.55	131.23	307.55
Blue	#0000FF	(0, 0, 255)	18.04	7.22	95.03	32.30	133.81	306.29
Green	#00FF00	(0, 255, 0)	35.76	71.52	11.92	87.74	119.78	136.02
Yellow	#FFFF00	(255, 255, 0)	77.00	92.78	13.85	97.14	96.91	102.85
Orange	#FF7F00	(255, 127, 0)	48.84	36.45	4.46	66.86	85.66	59.62
Red	#FF0000	(255, 0, 0)	41.25	21.27	1.93	53.24	104.55	39.99
Grey	#808080	(128, 128, 128)	20.52	21.59	23.50	53.59	0.00	270.00