When Craving Tech just had its new logo, I was looking for some free online color palette generator (to redesign the site’s color theme). I think the simplest one was the Color Palette Generator from Degraeve.com. All you have to do is pass the URL of an image (so you have to upload it somewhere else first – imageshack.us will do) and the online tool will generate a color palette based on the image.
You can then used the generated color (in hex) and match the site’s theme with your logo. I also used the same online tool to create my business card’s gradient colors.
Check DeGraeve.com’s Color Palette Generator when you need some quick and easy color inspiration from an image or a logo. If you have found other good ones, please share them with us here (such as the Adobe Kuler, etc)