Well, I don't have a particular favourite colour ... I just have something nice to relate to every colour...
You know, each of them have their own significance. You can't just replace them with others.
Not in a dramatical or philosophical way, though.
For example, Purple because HEY! SHERLOCK!
In nature, I like Greenery more.... flowers are nice but I still prefers leaves and grass over flowers... it's more umm.... calming.
Clothes wise, I have almost everything grey and black.
And the list goes on....
Ooooh and Didn't know about Periwinkle... It's pretty nice.