The blue ball in the game of pool is the #2.
The number 2 ball is a solid blue color.
There are 8 coloured balls in a standard game of pool (the 1 through 7 and the 8 ball), and there are 7 striped balls. That sums to 15 balls.
there are 7 solid, 7 striped, 1 black 8-ball, and1 white cue ball.
Cue ball - white 1 & 9 - yellow 2 & 10 - blue 3 & 11 - red 4 & 12 - purple, but pink is used on televised tournaments in the US 5 & 13 - orange 6 & 14 - green 7 & 15 - brown 8 - black
A six ball for pool is dark green.
5
In 8 ball pool there are 16 balls on the table, a cue ball, 8 ball, 7 solids and 7 stripes although they could be red and yellow etc. In 9 ball there are 10 balls on the table, cue ball, 1-7 solid, 8 ball and striped 9 ball.
15
8
All pool games require that certain balls be identified. If you chose to use a custom set of pool balls with only the markings necessary for a particular game, it would not be contrary to the regulations to do so.
There are seven striped balls in billiards.