Enable theming.

[t-rhex]

Is your feature request related to a problem? Please describe.
It would be nice if the user could select a color/theme to match their branding.

Describe the solution you'd like
It would be nice to have a config file with all the themes and user can enable or add themes/color patterns based on their branding.

Describe alternatives you've considered
Not at the moment

Additional context
N/A