How can we get the message to Apple that it would be really cool to also allow a red screen option across the OS? Is this unachievable, or easy for Apple to do if they realise how cool it is?
I'm guessing this is unachievable, but thought I'd put it out there.
Get multiple developers to ask for it as a feature, possibly make the option to be any colour, it may be useful as an accessibility item, and Apple is very responsive to items that add capability for the disabled.