This tool is real cool tool for colour selection.
A photo can be uploaded for analysis then the tool would recommend some colours. The colour values are all there, RGB for video, CMYK for print and the Hex numbers for the web.
Really cool stuff man.
Plus it is a web tool by Adobe. Check it out.
Here is another colour web tool. Plus it also has other tools like, Image Editor, Effects Editor, Image Markup and others. Check it out at the following web link.
Yet another cool colour tool collection using the web browser.