I've created a Hi-Contrast theme for Audacity.
It's for use with Microsoft's Hi-Contrast 2 theme in Windows 10. I'm unable to tell if it solves the Hi-Contrast problems or not. What improvements should be made and why?
One issue is that we don't know what works well for people with typical poor eyesight. In terms of colour blindness, shades of blue generally are good for more people, as red/green colourblindness is commonest.
I imagine the image needs to work well if converted to black and white. That creates a problem where we need 'three levels', e.g. the waveform, the selection, the background. One at least has to be grey in a 'black and white' version.