I get that the Discover has a new color palette to reduce eye strain (although there is plenty of research to argue against that, and I personally disagree). However, there have been plenty of instances when attempting to report where the colors are clearly of such low constrast that it's almost impossible to read/see data, especially if fields are selected.
Please let some of us opt to change the skin of the tool to something more simple that closely matches the older version of discover, or at least standard popular OS convetions. I find it much easier to scan data with black text on white than gray text on gray, especially given all the extra visual noise thrown on the screen with jagged divisions of columnar data and the like.
Low contrast problem areas in red, jarring shifts in column division in yellow.