Microsoft has added a new free tool to its myriad of cool solutions: SharePoint Color Palette Tool. You can download this free of charge from the Microsoft Download Center website.
What is a Color Palette ?
If you have been playing around with SharePoint 2013, you probably saw the new design wizard that lets you choose a theme for your site.
By default, 32 of those themes are available out of the box. You can create your own by creating a .spcolor file.
A .spcolor file is actually an xml file that consists of an element and the value of that element, much like CSS files to design a website.
More information and a full table of all items here: Understanding Color Palettes on the msdn website
This post has some easy to read but very complete material: SharePoint blog
Why do I need this tool ?
Well, you can go ahead and do manual editing of a big xml file, or you can use this easy and straight forward design tool.
It looks like this:
Functionality is very straight forward:
You can change the values via a color picking or by editing the values, add a background image, do a preview and save the whole thing as a .spcolor file.
Easy as pie, but will save some hours designing sites !