I recommend this app. You can customize the swatches pattern and color in your settings for product and collection pages. The swatches in collection page is "request to have" feature. In my case, I activated it and within 24 hours the app support team helped to integrate the feature to my store. I also did some special customization like arrangement to the swatches by email request. They are quite helpful and willing to customize. Try your luck as well!
Wondering if you've found your color swatches apps yet? If not you can take a look at our list of 12+ best Shopify color swatches apps, we also have a guide on adding color swatches to products on Shopify in case you need it.
Hope this helps!