Sol, I have a small item for the wishlist and I am very aware of how difficult this could be to implement.
A bit of background: My vision is not what it should be. Let's face it - I'm getting older. Fonts and color combinations that wouldn't have bothered me a few years ago are beginning to really "bug" me. Sites that have jumped on the "black is GREAT"" bandwagon leave me completely cold - especially if they use grey or some other low-contrast color for fonts. This site, while nice and white uses a light blue font that is very tiring to my eyes. Making a highlight in order to change/delete in this box, for instance, is kind of a light-yellow color and barely distinguishable to my eyes. Not at all like the blue highlight in an in-line review. For my own use in my web browser I've devised a script (for Pale Moon) I call "colorchange". What it does is remove the colors to fonts and the like, including background colors. It works here, but only to a limited extent.
What would be great is if we could have a change to our "settings" page that added check boxes or something that indicated whether or not we wanted light blue fonts or just plain black. The font size icons are nice, but color can't be changed.
EDIT: After holding a magnifying glass to the screen, I've determined that the font on this page seems to be black, but the very faint blue background makes the font appear with a blue tinge. Killing the background color makes the font stand out much better - and it is black now. Apparently, it is an optical illusion on my part. Some control over local font (color and/or size) might be handy though.
Tom