I had never heard of Wolfcrow, but he makes some interesting videos.
This video is about the importance of colour in movies and in interior design, but I think it could be applied to
photography as well.
The 60-30-10 Rule states:
In a scene colours should be 60% the dominant colour, 30% complementary colour, and 10% highlight colour.
Note it is called a rule thought the video, and he gives a couple of exceptions, as well as
talking about the lack of it.