Computers and televisions make use of additive color mixing. The following figure shows that when the primary colors red R$,$ green G$,$ and blue B are mixed together using additive color mixing, they produce white, W$.$ Using set notation, we state this as R $\backslash$cap B $\backslash$cap G$.$ The colors yellow Y$,$ cyan C$,$ and magenta M are called secondary colors. A secondary color is produced by mixing exactly two of the primary colors.

Determine which color is represented by the following. Assume the colors are being mixed using additive color mixing. $($Use R for red, G for green, and B for blue.$)$

R $\backslash$cap G $\backslash$cap B$\text{'}$