I avoid the field picker because it is way too dark to read easily. I didn't find a way to change it.
no I'm on a MBP retina 2015
I can read you picture without problem
Might be OS/Hardware/System settings specific.
OSX 10.10.5 (yosemite)
Macbook Pro 15 mid-2012
Not even sure where you would go about looking to change those settings if you could. Certainly not anything inside of filemaker that I've seen.
Do you maybe have "dark mode" enables under System Preferences > General? Maybe something there can help.
The difference between Mike and you is that you have "Reduce transparency" set to on in System Preferences - Accessibility - Display while Mike does not have it checked.