After thinking about it, I'd propose breaking the entire SINAD range into 10 colour groups (with another two in reserve for the future). DACs would get a 'colour' in the review which puts them in a 10dB band.
It fits in with the current colour scheme (R,O,Y,B) but adds all the colour codes for resistors and their values.
Black 0 (50dB+) (0.3%)
Brown 1 (60db+) (0.1%)
Red 2 (70dB+) (0.03%)
Orange 3 (80dB+) (0.01%)
Yellow 4 (90dB+) (0.003%)
Green 5 (100dB+) (0.001%)
Blue 6 (110dB+) (0.0003%)
Violet 7 (120dB+) (0.0001%)
Grey 8 (130dB+) (0.00003%)
White 9 (140dB+) (0.00001%)
And in reserve for the future of 32 and 64/128 bit DACs
:
Silver (150dB+)
Gold (160dB+)