Checked a few versions, I have not seen anything related to any color correction options currently or in the past.
Best options that you've got would be:
+Install a chrome extension that might let you optimize colors to your preference
+Inverting color scheme on your local machine
+IPS or VA panel monitor maybe?
Personally I run an IPS monitor at work, I am not seeing anything that appears washed out as you say, the UI has definitely evolved since the Java version, but there hasn't been a contrast reduction that I can see.
Either way, I'm filing an enhancement request with our developers to look into providing an option to perhaps invert the color scheme, or setup color profiles.