The open attitudes and gestures shown during the early days of Kim Jong-un's rule in North Korea...

...were all the work of Jang Song-thaek..
In reality, Jang Song-thaek was quite interested in opening up the markets.
Since Kim Jong-un didn't know much during the early stages of his rule,
Jang Song-thaek took the lead, which is why those colors were so visible.
Of course, that was before he went "Auntie, Auntie, bye-bye!" lol