@yummyrec Unfortunately Filtering isn't designed that way and it would take a bit to add that kind of query to the code. However, it can be done with the script I use in Filtering, Isotope. Take a look at the example here, http://isotope.metaf...on-filters.html. The setup would be like color is the category and size is the tag.
That being said it would be a custom project or another section (someone was asking for a PostPins type of layout with the ability to filter by categories and tags).
If you are interested in something like this, private message me (just click on my avatar and then send message) to continue the conversation.