As a Trello user, I want to be able to change the background colors of cards so that I can differentiate between different cards using color (card background colors)

User Problem

Users would like to be able to change the background color of cards (perhaps to match the first label added to the card). 

Suggested Solutions

Add the ability to set the background color of a card on the card front for all single-board Views (especially the Calendar View), similar to how you can set list colors. 

Current Workarounds

• Use labels
• Use list colors

I'm also sure there are third-party options out there.