Color support?

[rubyFeedback]

I am playing around with TTY::Box right now.

I tried to add colour output:

box = TTY::Box.frame(width: 70, height: 15, border: :thick,  color: :steelblue)

:steelblue should refer to the HTML colour steelblue, and the RGB values that
this represents. TTY::Box does not seem to accept a :color keyword.

Could this be added? KDE konsole has no problem with RGB colors. In one
of my color-related projects I make heavy use of colours, so colored
borders and colored text content of the box would be useful IMO.