The different colored livery is different from Utkrisht scheme , I believe.
Those coaches are re-painted as when when it goes for overhaul and given to many trains. I saw a post where just a single coach of a train had that livery.
Utkrisht is just remodeling the interiors, isn't it?
It may be coincidence that the coaches that rake got was repainted and...
more... also Utkrisht scheme was also applicable to that train.