Heey, sorry it took me a bit to get back to this. But sadly this did not work for me, I even tried changing transparent to the colours I wanted, but annoyingly it still highlights all new responses with this bright, annoying white that makes them hard to read on my otherwise black theme.

The code to make it not do that on new plurks works fine, but I guess there might not be a way to do it for new responses or something >>