Color theme
"The Theme holds 9 different colors, including 4 foreground colors, 4 background colors, and a global background color. Each foreground color should be readable on every background color, with the exception of the inv types, which are designed to be used in warnings or modals and should only overlap each other.
A variable's contrast should be seen as an offset to the global background color, so instance, f_high represents a high contrast color against the global background, and so does b_high, representing a highly contrasted color against the global background."