Is your feature request related to a problem?
The web_company_color module let you set colors for different companies. The problem is that once you set a color, you can only change it to a different one, but you cannot reset it. This means that you will end up trying to mimic original Odoo color in order to fake kinda reset behavior.

Describe the solution you'd like
The solution could be to just add a button to reset colors to empty so original Odoo colors will be displayed.

Describe alternatives you've considered
The color input type does not allow empty or full alpha color so reset seems to be the best way.

Additional context
No extra context required.