I upvoted this request, but in the interim - if you’re running MacOS 13 or newer, you can selectively change system-wide how different colors appear through the OS Accessibility settings. You can also set up a keyboard shortcut to toggle it on and off. Earlier MacOS versions could also do this, but they aren’t as customizable for different types of colorblindness.    https://support.apple.com/guide/mac-help/change-display-colors-easier-onscreen-mchl11ddd4b3/13.0/mac/13.0