Keyboard shortcuts for color selection

[gitkeerthi]

It would be nice to have some keyboard shortcuts to select colors from the palette. Perhaps use the number keys. Keys 0 through 9 can be assigned to a color each. Key 0 (zero) could be the default color (white).

This will come handy especially in the distraction-free mode where currently there is no way to select a color.

(And, many thanks for this app)
Cheers!