Shopify Refresh theme combined listings setup
Short answer: Refresh does not solve this on its own, because separate products have no link between them…
The two things every Shopify catalogue with colours runs into: a gallery that does not change when the shopper picks one, and colours that live as separate products with no way to show them together. Guides, comparisons and migration notes from the people who build Rubik Variant Images and Rubik Combined Listings.