Is your feature request related to a problem? Please describe.
Add options to change bar background color and background opacity.

Describe the solution you'd like
Add option under bar tweaks that adds a slider for background color and opacity.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Even adding a border option could be very cool, love DBM but the visual styling possibilites is a bit rough at the moment compared to BW.