What are the solid colors, solid colors, dark colors and bright colors in fabrics? How to distinguish brown from brown?

Solid color is solid color, which means there is only one color, and there is no printing.

Dark color is the antonym of bright color. Dark color refers to dark colors such as black, brown and gray, and bright color refers to bright colors such as red, yellow and purple.

Coffee and brown can be distinguished, but I can't tell you why now. Coffee is deep and shallow, and so is brown. Sometimes coffee can also be brown, and brown can also be coffee. There is no fixed boundary. Let's compare it with some reference objects.