Is there a color picker plugin for Eclipse?

Jspresso Colors 'n Fonts

Just select any java string literal and right click on it to open the contextual popup menu... then select Jspresso>Choose Color... or select Jspresso>Choose Font...

Supports also tooltip : fly over your string literal to display the current color or font... and activate hyperlink to open the editor popup !

Aptana Studio has really great support for CSS. CSS color picking is easy, you can grab a color from anywhere on the screen.

You can install Aptana as a plug into an existing Eclipse installation. http://docs.aptana.com/docs/index.php/Plugging_Aptana_into_an_existing_Eclipse_configuration