Describe the solution you'd like

Ability to change some colors as defined in

This could be implemented in three levels:

• CLI flags: easy to implement, less usability (e.g. users may alias hours='hours --colors...')
• env variables: can be used as default values (if present) for CLI flags; users set them in their shell configs
• full fledged configuration file: let's not go there, yet 😉

Is your feature request related to a problem? Please describe.

I'm a terminal freak and I want hours to be best looking.
This may also be an accessibility feature for people with vision deficiencies.

Describe alternatives you've considered

No alternatives, AFAIK.