When the Guardian fires Luke as his lieutenant, Luke quits the Chosen and moves into the Art Store.
The Art Store was once Danni's room. When Salene finds him he's still unpacking. So when did he find time to get rid of all Danni's drapery?
This is what it looked like before Danni moved in. Luke has (in the blink of an eye) reverted it to its original color scheme.