This is what confuses me. It feels like all designers just somehow universally agree on a single (or maybe 2-3) colors that will be in style a couple of months. If someone really fits in, say green, and they like green, they should just stick to that color. Not read somewhere that a certain color is in style and just go with that. I might be a bit boring in that I really like red/blue, and I usually have something either red or blue on me all year round. Not sure if my line of thought here is making much sense, but oh well, it's late!And such things are influenced by the fashion industry/runway designers. Trends that last 6 months at a time, etc.
As a bit of a look inside by fashion-sense: I get most inspiration from the brand & website called "By the 'R'".