The first M colors that came to mind were Maroon and Magenta, but neither of them yielded any exciting stories. And then I remembered Mint.
Mint is a soft, light green color named after a plant with a very specific, strong scent, usually associated with freshness and chewing gum. When I was little, I remember rolling around in a mint patch during a class hiking trip, enjoying the scent.
In ancient Greece mint was associated with funeral rites, along with other spices and herbs that had a strong enough scent to mask the smell of a dead body.
As simple as this story is, I kind of like it for a few reasons. One of them is that I have never been crazy about Hades and Persephone. The whole "kidnap my niece and force her to marry me" just sounded disturbing to me. On the other hand, I kind of find it adorable that someone can have a crush on the Lord of the Dead. In some versions of the story I have found Minthe watched Hades from far away before she approaches him with her feelings. There is someone out there for everyone.
For one of my favorite literary characters, Minty Fresh, see the books A Dirty Job and Coyote Blue by Christopher Moore.