grigori991

Plugin registeres simple widget within wordpress blog, that allows any visitor to change background 
color of theme. Actually it doesn’t change theme’s css file, but renders some style tag to user 
browser, that change the color locally. 
New background color associates only with user, that setted the color, and it tracks from cookie. 
So, if first visitor sets background color to ‘Rose’, second visitor can choose ‘Lime’ and third can 
leave that attribute to default and everyone get what they want at same time. 
If blog visitor sets background color to ‘Default’, browser explicitly deletes the cookie. Otherwise, 
cookie deletes itself after 30 days. 
Widget uses 4 ‘web-safe’ colors – #00FF00 (lime), #00FFFF (bluegreen), #9933FF (violet) and
FF0033(rose).

BGColor Setter

BGColor Setter plugin sets up the widget, that allows any visitor of blog to dynamically and graphically change the background color.

szucsadam

I have found a very annoying problem on the admin panel.
Where the comments are listed, unapproved comments had lightyellow color (HEX:FFFFE0). 
It is hard to make difference between unapproved and approved comments with this color.
This plugin changes the background-color to orange [#DD823B] (from WordPress 3.8 Sunrise admin color-scheme), and the author’s name and his comment to white. This makes the comment approving system easier to see on all monitor types.

Pending Comments Highlighter

This plugin overrides the default pending comments background color in WordPress admin.

BGColor Setter vs Pending Comments Highlighter