I put together a service that takes a URL and spits back the dominant hexadecimal values used. It doesn't work on all pages, but give it a try to see what I mean.

I've found it to be useful for when I see a site that has a color palette I like and I don't want to have to take a screencap and use the eyedropper to get the color codes.

Try putting in https://hackernews.hn/ or myspace.com, etc.

Link here:

http://www.todotoh.com/rgb/rgbanalysis.aspx