alternative visual indicator for if a hint is included or excluded

[mimuki]

right now, the only indicator of if you've excluded or included a hint (before you save) is by the colour of that hint- which is usually fine, but can cause issues if you're colourblind, or you use a greyscale monitor. having the option for an alternative visual indicator would be nice, like for example adding a tick or a cross to the hint, or giving an excluded hint a dotted outline or something.

Example of how hints look in greyscale:

[david-tejada]

Makes sense. I will try and see what works best.