Table 4. STDs of color components in various dynasties.

	Tang	Five	Song
R1	22.96	36.14	25.97
G1	30.33	33.83	13.78
B1	28.38	34.31	15.46
R2	11.90	16.42	17.73
G2	9.93	14.79	15.57
B2	9.57	13.21	15.08
R3	27.91	37.09	30.43
G3	38.95	36.68	30.04
B3	30.36	30.90	27.47
H1	21.49	20.12	23.61
S1	38.83	44.97	51.45
V1	22.08	35.91	22.65
H2	28.86	26.53	17.24
S2	21.75	25.37	21.06
V2	10.54	16.53	17.76
H3	28.36	30.92	24.58
S3	42.17	43.47	42.46
V3	28.24	37.43	29.44