How may colored balls in billiards?

Answer 1

[15 reds, 1 yellow, 1 green, 1 brown, 1 blue, 1 pink and 1 black.]

Those are the colours used in Snooker which is played on an English Billiards table.

English Billiards uses just three balls: a red, a plain white and a 'spot' white (or increasingly commonly these days, a yellow).

Answer 2

In the game 'billiards', or sometimes called 3-cushion billiards, there are only 3 balls used. One white, one yellow, and one red. But in the sport 'billiards', the traditional colors are yellow, blue, red, purple, orange, green, maroon, black, and white. In recent years, the purple and maroon have been replaced by pink and brown respectively since these colors show up better on TV.