They all have 3 letters, but "red" and "tan" have exactly 3 letters.
Red? -.-
Ash
RedTan
Red is the only color in the rainbow spectrum that is spelled with only 3 letters. Red is the only color in the rainbow spectrum that is spelled with only 3 letters.
The three primary colors are Red, Blue, and Green.You can remember them easily when you remember Roy G Biv. The capitalized letters are the three Primary Colors.
Some people think letters have particular colors because they have a condition called Synesthesia. A synesthete's brain tends to associate certain letters with colors.
lavender
Emerald
CornFlower
Brass is a color. It contains the letters B and S.
Jade, Khaki and Kelly Green are colors.