In January, 774, the color of chofuku for the second-rank Ministers was decided as medium purple, and in July, 806 the color for shichii (seventh rank) was changed to deep green, the same as rokui (sixth rank), and the color for shoi (initial rank) was changed to dark blue, the same as hachii (eighth rank), and in September, 810 the dress color for Shoo (prince who didn't receive any proclamation to be an Imperial Prince) was changed from pale purple to medium purple and the color for the second rank Ministers was changed from medium purple to deep purple and the color for nii and sanmi (second and third ranks) was changed from the pale purple to medium purple.
当色は宝亀5年正月に大臣で二位は中紫とし、大同(日本)元年7月には七位を六位と同じく深緑とし、初位を八位と同じく深縹とし、弘仁元年9月に諸王二位以下の浅紫を中紫に、大臣で二位を中紫から深紫に、二位三位の浅紫を中紫に改めるなどのことがあった。