Definitely agree with the problem with the grey and pale blue theme. Consider the reader with access needs, whatever they are. I have normal eyesight, but because I have a strange posture I sit a long way from the screen, and with that colour combination I can't see anything. If I zoom it up huge it goes blurry (projection screen is reasonably low resolution but the only way I can lie on my back and have the monitor on the ceiling) and in any case it makes it really scrolly. I know plenty of ways to change sites, so I've zoomed and CSS styled to my heart's content, but the problem I am now left with is that the primary way of identifying quoted and unquoted text is a box which is invisible after you have changed accessibilty background settings, and the different font colour, which I do not have. The box needs to be ... I don't know enough about web settings to say what it needs to be, but after you have played around with Nosquint to remove the colour scheme it needs to be still visible. My needs are a bit unusual, but having access needs is not (poor eyesight, colour blindness, autistic spectrum, dyslexia, many more that I can't think of just off the top of my head).
To access this new site I have had to change to an entirely different browser and install a viewer extension and I'm still finding that I can't see the reply box (happened upon it by accident and it became visible after clicking in it) and I keep reading and re-reading the quoted text as I cannot tell it's quoted. Nor can I tell what is a post and what is a signature, so I shall have to turn them off, but then I won't know what people play because that's usually in their post sig.
So although people can impose their own text settings to eliminate the grey problem, it just creates new and different problems.