To close the loop on this based on the features currently available in Shopify, my question isn't possible with vanilla Shopify. You can add tags and search by them, or you can add the metafield and have one color per product, but I never found a sol...

I am trying to implement color filters on the products in my store, but it seems my requirements aren't as simple as i had thought. I want to have a product with one or no variant that has multiple colors assigned to it. I don't mean color options he...