You can send this emoji with a ⚪ White Circle emoji to represent the white ball if you are asking someone if they want to come play pool.

The ⚪ emoji is commonly used in sports-related conversations to represent a ball, particularly in sports like soccer, basketball, or baseball. It can be used to refer to the ball itself or to indicate playing or watching a sport.

This emoji looks like a 🔵 Blue Circle but has a white color. Its meaning may be different depending on the imagination of the user however one of the common meanings it has acquired is a symbol for asexuality (i.e. absence of sexual attraction to anyone) and genderlessness (i.e. refusal to belong to any gender). Also, it may mean engagement.