Have a go and enjoy! http://www.francescawhetnall.co.uk/sl/etsy/etsypixelpicker.htm
You can upload a picture from your PC or pull in a picture from the internet by pasting in the jpg URL. Then click somewhere on the image where you see a colour you like and watch as a magical rotating colour cube of Etsy items appears. If you don't like the items click again!
This could be great for finding earrings or jewellery to match an outfit - just upload a photo and click to search!
Here's a screenshot of me playing with one of my favourite paintings. I picked up a lovely leaf green from the stripes on the right:
NB - You'll need to install the Silverlight plugin when prompted. (Silverlight is Microsoft's version of Flash).