A special 7 ball is made for the game of 7 Ball. 7 Ball was introduced to be essentially identical to 9 ball, but limiting the table to 7 balls to make it a faster game.. this was intended for television tournaments. The idea never did catch on, but 7 ball sets and racks have been sold.
Nine ball (pool)
yes
The blue ball in the game of pool is the #2.
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.
5
A six ball for pool is dark green.
The number 2 ball is a solid blue color.
1-yellow, 2-blue, 3-red, 4-purple, 5-orange, 6-green, 7-maroon, 8-black, 9-yellow stripe, 10-blue stripe, 11-red stripe, 12-purple stripe, 13-orange stripe, 14-green stripe and the 15-maroon stripe. ADD: Technically this is incorrect. Eight ball pool simply describes a game where you shoot your balls in first, then the 8 ball last to win. So, each player has 7 balls to pot, and then the 8 ball. These 7 balls can be any colors, as long as the two groups are identifiable from each other. Yellow and red are used extensively, and there are endless variations for the 2 groups. Additionally, there is absolutely no requirement for "stripes" and "solids" , or numbers on the balls, so really this answer is completely misguided.
15
8
Maroon. This ball is a more of a burnt sienna color. It is a decorative brown, like many woods. The Ivoryline balls set the standards for pool balls of today.
On the break if you make a solid AND a stripe then technically it is still an open table. (meaning you can make any of them in) whichever is made in the second shot as long as it isn't both kinds again then the one you make is what your ball type is.