This may just be a nice coincidence but the web color scheme of Openserving, a Wikipedia project, looks "greatly inspired" from the color scheme of Flickr.

Not just the logo colors, one of the graphics used on the Wikia Openserving homepage is exactly similar to that grey blank face icon of Flickr. See the screenshots below:



The colors don't have the same hexadecimal values but look pretty much the same on the computer.