Extra Colors

There are sixteen unique main colors in the game including:

Red, Orange, Yellow, Lime, Green, Blue, Light Blue, Cyan, Magenta, Pink, Purple, Brown, Light Gray, Gray, Black, and White.

This is a... decently sized amount of colors, but there can be more! 12 more, in fact.

Here are my suggestions:

Tan, Coral, Maroon, Navy, Turquoise, Hot Pink, Dark Green, Dark and Light Brown, Light Yellow, Lavender, and Sky Blue.