I've built a tool that allows you to browse the Pixel Joint gallery by searching for colors. It's online and free, go play with it!
Here is also a video demonstration of how you might use it.
I hope you like it!
Special thanks to all the many PJers who helped test this during the creation.
Amazing tool. I'll be spending a lot of time with this! Thanks Hapiel 
I use it just as a sort of quick galery of pixel art pieces that I feel I can learn something from or that I simply admire, as well as a galery for references for work pieces i'm doing or so. It felt quicker to come across random useful images than to google them on purpose, tho I admit it's losing its "random factor" and its charm by now...
Amazing job! I can see myself using this tool very often
interesting! also nice just to see a longer list of pixel art.
Yeah! This is totally amazing and fun to use. You can easily find some cool stuff which is no longer so easy to find from the past. And with just one click to find a gallery of an artist you didn’t even know existed. Very useful tool. I have a feeling people will go crazy for this ... Congrats! 
WOW! This is amazing. Thank you. I don't fully get the connection to pinterest, but I don't like it either. Was trying to force myself to understand how it works and learn to use it in some productive way and it was always a fail to me.
I happen to hate pinterest with a passion, so if I can even only get 1 person away from pinterest that is a huge success for me!
Thanks for your kind words :)
I just took a look at the demonstration video and let me praise the hell out of your effort, this is an incredible idea super well done! This can very well replace pinterest for me haha
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All your comments make me very happy, thanks a lot!