Accessibility 
There's a discussion at Template_talk:Tmbox#Accessibility that might interest some editors of this page.  In particular, it would be nice to know whether the proposed talk page templates (similar to what's at the top of this page) are sufficiently readable for people with colorblindness, or whether a different/lighter background color is important.  Your comments are particularly wanted.  (If this issue in general interests you, then you might want to get in touch with WP:WikiProject Accessibility, too.)

Additionally, an editor has very kindly offered to figure out how to create a customizable "skin" to change the background colors in the templates if this would, in fact, be helpful to anyone.