Provide colour suggestions to increase rating
The app is already a good tool to assess how well a colour pair works as it is, but unfortunately it doesn’t help improving the rating. It would be very handy to have two more buttons that increase the contrast up to the next rating (i.e. up to A if you’re below A, up to AA if you’re between A and AA, up to AAA if you’re between AA and AAA), respectively by “pushing” the background and foreground colour. Pushing should keep the hue.