Have different colours for uppercase and lowercase password characters

[Rhiyo]

If you have Settings > Appearance > Password > Colourise passwords enabled, numbers and alphabetical characters are coloured differently which is super helpful for readability.

I'd love it if you could extend this to make upper and lower case characters a different colour too. Maybe you could go one step further and make symbols also a different colour.

(Maybe even one step further again and allow this to be configurable somehow)