P: Shades of grey for different selection states are not different enough

Whenever I see someone making this point, I just think they're right.

Whenever someone posts this, I wonder if they have their blackpoint miscalibrated. Monitors usually come WAY out of calibration especially in blackpoint, so this is certainly possible. There three shades are so blatantly obvious to me, that it's hard for me to understand how they could be hard to see on a properly adjusted viewing system - especially the beginning and end of a selection.

I could not agree more!!! Whilst I appreciate that for a designer harmonious gentle shading may give something that is aesthetically pleasing, it is more important with a productivity tool to ensure that selection is clearly identifiable without strain.
I have had several times when I unexpectedly applied an action to a selection because in the pressure to get a job done I did not notice I still had more than one photo selected. Perhaps if you let the user set some of the UI interface colours then the product could ship with an excellent aesthetically pleasing, but impractical colour scheme. This would be good for product shots, reviews etc, but then the user could set whatever garish colour they want to be able to see selected shots easily.

I would really love it if Adobe and other vendors started using the notions behind things like Solarized in their UIs.