Halfway through my workday, my queries became monochrome and extremely hard to read. I reached out to Support, who had no idea why, but eventually was able to tell me this change is intentional and permanent, and all queries will look like this going forward.
My only option is to manually configure new queries to look like old ones if I don't want my dashboards to look like trash. This is a horrible change. This is going to add a huge amount of work to every query I make. On top of that, a ton of visual indicators for rows and columns were all whited out from this, and cannot be restored to look like it used to. This is an extremely unwanted and baffling change that makes it extremely difficult to read tables. On top of that, there's no way to make new queries actually look the same as old queries, I cannot make them easy to read again.