I SOLVED IT!!! I had been living with no font colours on my phone for 4 years and never knew the reason. I got a new phone and this setting transferred to it from the old one, so I was finally sure that this is a setting and not a bug. Go to Settings > Accessibility > Visibility Enhancements and turn OFF "High contrast fonts". I don't know why this was ever on for my phone but that is what had been keeping my phone from displaying font colours properly. Hooray!
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