I'm using Eclipse Galileo PDT for my work. I also use it to edit my CSS files.
Is there a plugin that lets me pick a color (from a palette or even anywhere from the screen) and wich returns the HEX value of that color into my CSS file?
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
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 !
I would recommend to use external software: http://www.colorschemer.com/online.html You can integrate it into Eclipse.
I have used this plugin called colors in both Galymeade and I just dropped into Galileo. http://www.eclipseplugincentral.com/Web_Links-index-req-viewlink-cid-1281.html you can copy the color code to/from clipboard or editor. Slider bar for coloring, color picker etc. I used it to edit css files on a recent project. Good Luck.
You might want to check out the second example at http://eclipsescript.org/#example-scripts.
I created a Groovy Monkey script that opens Eclipse's color picker. It was inspired by what fornwall pointed at (second example of Eclipse Script plugin). It's also able to recognize if current selection is a color so it can be selected it in the picker.
The script is on gist.github, instructions included.
Having a shortcut key for a script is not (yet?) possible in Groovy Monkey, but Crtl+Alt+M runs the last executed script.
A good plugin to consider is the Designerator Color Plugin from the Designerator project. It contributes a Colors view as explained in this blog post. No need to install the whole software, the color view is in a separate feature that can be installed by itself.
The Sampler plugin could also be of interest. However it does not show a color picker dialog where one can select a color, it only has the color picker tool for selecting a color from the screen.
There are a few plugins at the Eclipse plugins site that might meet your needs.
CSS Designer looks promising:
JointLogic CSS Designer is an Eclipse plugin that provides CSS authoring facilities like - CSS Styles view, CSS declaration designer with preview and web-oriented color picker. It integrates with Eclipse Web Tools Platform (WTP) to allow CSS authoring while editing CSS and HTML files.
Here's a screesnhot from the homepage:
来源：https://stackoverflow.com/questions/1471546/is-there-a-color-picker-plugin-for-eclipse