Only applies to White theme. So repro steps:

1. 1. Set phone to smart invert
2. Go to app and set theme color to white

Expected behavior: the content colors are all inverted. So the text color is white, the background dark.
Actual behavior: the content colors are inverted for blue (like links) but both the background and text color are set to white, making it impossible to read.

@JMinor I've been exploring both this and https://phabricator.wikimedia.org/T248435 via Simulator and device, and haven't yet been able to reproduce the crashes or illegible reading state. I've tried using both the Smart Invert and Classic Invert accessibility settings on current 6.6.0+ development builds to trigger the reported conditions.

Going to spend a bit more time this morning on this, but if no repro luck close these two and move on to other tickets.