What is the origin of surnames based on color?

It looks like some are related to physical appearance:

• Black supposedly relates to hair color.
• Green had a pretty colorful history. It supposedly referred to anyone who liked green, played the Green Man in the May day parade, etc.
• White was someone with white hair or a pale complexion.

Again, most of them seemed to harp on some element of physical appearance.

Color Surnames have different origins and depends what cultural where their born or their descendants like Ireland, Scotland Britain or England, Wales Cornish evenly other origins of europe color surnames Like my Surname "White" is Irish gaelic celtic its means in irish Ban or Bane or Macfaoitigh or MacWhite. I am Half Irish and Half German also White could be German but my Irish whites are not Germans. But Color surnames are Saxon or Celtic names too of Color surnames. My Irish White's or Macfaoitigh's sound very cool and my surname is 50 common surname name in Ireland and 20 common surname in United states.