Snooker is played with
15 red balls (worth 1 point each)
1 yellow ball (worth 2 points)
1 green ball (worth 3 points)
1 brown ball (worth 4 points)
1 blue ball (worth 5 points)1 pink ball (worth 6 points)
1 black ball (worth 7 points)
and
1 white ball which is used by the players and is not worth anything.
http://wiki.answers.com/Q/How_many_coloured_balls_in_a_game_of_snooker