allow grouping of attribute terms

Hi! Our woocommerce store has a lof of variations with respect to color. For eg., there is green, algae green, fresh green – so they all differ in shades. This poses a problem on the shop & category pages as all the colors are shown for the filters. So, I want that when customers apply filter >’Green’ they should be able to see all the shades of the primary color green, i.e., all the variations/products that includes the other shades – algae green and fresh green. Is there any other way to define the color terms as primary or parent and their child terms, same as categories ?