Colour Theme missing option in Prem 25?

Hey there, Long time premiere user, just downloaded 25.

The Preferences > Appearance window is actually now inferior to the older version in that in Prem 23 I have a sliding scale of "brightness" which allowed me to customise the appearance of Prem. I prefer a the lightest grey possible as it seems to cause me to strain my eyes the least.

In this new version that sliding scale has been swapped for 3 modes, titled

Dark, darker or light.

The light one which is just white.

Dark is very dark, almost a black background

Darker is still very dark, much darker than I would like it. 

I've got it set to Darker as it's the closest to the old setting but it's still much darker than i'd like it meaning I'm struggling straining my eyes during long edit sessions.

Can this please be put back to a sliding scale? Seems much more user friendly.