Colorfullnes chessboards
You maybe right. There must be guite dark squares and bright ones and so that the dark square is at the left bottom, and not just totally random colors.
Maybe these are better: http://www.julisteita.fi/colorfullness2/ ?
Now I prefer this, number 53:

With different method I now coloriced chess pieces too:
http://www.julisteita.fi/colorboardsandpieces/
Now my favorite is maybe this:

Unfourtently some are very ugly because the method I now used

Just for fun I programmed one hundred different color chess boards.
Take a look: http://www.julisteita.fi/colorfullchess/
What is Your favorite? I like most number 63. wich is this: