Right now, you can only change the background for the entire board, and you can't set background colors for individual cards.
However, there's a Chrome extension that you might want to look into, that does allow for that: https://chrome.google.com/webstore/detail/card-colors-for-trello/nodlpencjjlohojddhflnahnfpfanbjm?hl=en
There doesn't look to be a way to turn on looking at the text of the labels to display, you can turn on color blind mode on your account if you don't want to just use the colors. This article has some helpful tips for how to best use labels.
You can also filter cards if you would like to only see certain cards at a time.
You might want to email firstname.lastname@example.org to ask about possibly turning on the ability in the future to change the color of the card or to display the text of a label!
Hopefully that helps!
You’re invited to our first ever Trello User Groups Good news for current and aspiring Trello enthusiasts! We’re launching Trello User Groups so that you can network, share ideas, solve ...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs
We're bringing product updates and pro tips on teamwork to ten cities around the world.Save your spot