When my iOS app runs on macOS in "designed for iPad" mode, the system foreground colour RGBA values seem strange.
Looking at [UIColor labelColor], [UIColor secondaryLabelColor] etc. on iOS, I see values like these: (Light Mode)
// R G B A
fg0 = 0 0 0 255
fg1 = 10 10 13 153
fg2 = 10 10 13 76
fg3 = 10 10 13 45
Note in particular that fg0, aka labelColor, is solid black.
When I run it on my Mac, the values I see are:
// R G B A
fg0 = 0 0 0 216
fg1 = 0 0 0 127
fg2 = 0 0 0 66
fg3 = 0 0 0 25
Here, fg0 has alpha = 216.
The result is that it looks like a dark grey, on a white background.
Of course it's reasonable for macOS to have a different colour palette than iOS - but native macOS apps seem to have solid 100% black as their foreground colour.
Do others see this? What should I be doing?
Note that I'm getting colour values using UIColor's getRed: blue: green: alpha: method and then using these colour values for some custom GPU drawing. Previously I was using solid black and white, but at some point I updated it to use UIColor in order to respond to light/dark-mode changes.