Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I don't think so. The images seem to be automatically downloaded from a server based on card issuer and type.
 
I wish there was a way. My Citi AA card is showing up as a bright gold color but the card itself is dark grey/blue/black.

There was a story a day or 2 ago that said Apple is aware of an issue where the digital cards are not identical to the real card and working on a fix.

http://9to5mac.com/2014/10/22/apple-pay-card-display-bug/
 
My Chase card accurately reflects VISA SIGNATURE status.

My CapitalOne card does not :,(

The rest of the artwrk is accurate.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.