Yes, there is a way to use your own photos to test out paint colors online. Behr Paint's website has an option called "Paint Your Place," where you can paint your own digital pictures of your rooms with their paint colors, and subscription is free!
You may not be able to find software in which you can use your own pictures. Online you can see what their various rooms look like with different colors of paint, but the pictures they use have been edited in an image editor such as Paint Shop Pro, to make the background a solid color. If you have an image editor, you can remove the background in your image then try different colors. You could even do it in MS Paint if you wanted to remove the background pretty much pixel by pixel.
The other option is to use the online software with their rooms and paint colors. There are quite a few room options and many many paint color options. The link is for the Benjamine Moore website:
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