In the new version of Minecraft Bedrock, it shows leather armor that's dyed any color as white on an armor stand. Say you had a blue leather tunic, it'd show as a white tunic on the armor stand. It shows up fine in the inventory or on your character though.
Thank you for your report!
We're actually already tracking this issue at MCPE-44669, so we will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.