Colors Not Showing in Merchant Center

We have about 12 products in our store, and 6 of them are the same products just a different color.

So for example, we have the LYNA goalkeeper gloves in pink and black but they are separate products. Since we do not have a color variant selected, Google Merchant center is giving me an error / warning saying Missing value color.

Is there a way to assign a color to this?

For example you can use the manual editor, a spreadsheet, feed rules. Lots of options. Below a video demonstrating the different methods.

Or alternatively, you can use the following app to use feed rules or manuall edit products: https://apps.shopify.com/multiple-google-shopping-feeds