Google Color attribute without using Variation

[DSEUK]

Hi,

Selling clothing and color is a required attribute for Google Shopping. 

I use variants for size but not color as in ebay connect each color needs to be separated. 

By default on the shopify admin product page there is, gender, condition etc how can I add color so that it feeds to google WITHOUT using another varient to publish this? 

[EmmanuelFlossie]

For example, if you have the color value in the title, you can extract this using feed rules: https://support.google.com/merchants/answer/7450276?hl=en