ZBrushCentral

Preferences > Icolors missing in ZBrush Core

So just signed up for Zbrush Core and the light gray on dark for the UI is pretty much unusable for me. Everything I’m seeing is that the options should be under Preferences > Icolors but there is no Icolors under Preferences in my install.

Am I missing something or is this ability not available in Core? If not, not even having a higher contrast option for people with vision issues is pretty lame.

Thanks.