These are pictures of real bricks. I used 24 different LEGO colors:
black, white, very light gray, light bluish gray, dark gray, dark bluish gray,
blue, dark blue, maersk blue, purple, dark green, lime green,
olive green, sand green, orange, bright light yellow, light aqua, tan,
dark tan, red, dark red, reddish brown, brown, and bright pink.