Is your feature request related to a problem? Please describe.
I want to use iSEE to create a single-cell explorer to deploy at our institute, and we’re working to meet web accessibility compliance (validated with a web accessibility tool ANDI. Since, in our iSEE app the color contrast (background and the text color) in a few panels are not passing the above tool we are failing the deployment.

Describe the solution you'd like
If the panel header-box color (e.g. green color in the panel 'Feature assay plot 1' in the snapshot attached) or the color of the text/panel ID (e.g. 'Feature assay plot 1' in the snapshot) could be modified/changed, it will resolve the problem.

Describe alternatives you've considered
I still could not find any work around to this problem since this feature is hard coded in the iSEE package.

Additional context
Attached is a snapshot of 'Feature assay plot 1'.