Without even realizing that you do it!
My girlfriend pointed this out to me and I have to admit. I do not do it on purpose it is just the way it is.
I spent the better part of two hours theming my phone and when I finished I had a blue and green dream. Even apps that I installed, I changed the color options either blue or green when I was allowed to. My desktop. A solid deep blue. My tool bars. Deep blue. The text, green. When I buy shirts, I tend to go for slate blue colors. My last three vehicles have been blue or green. My guitar, Blue. It just goes on and on in a never ending sea of Blue and green. I think I have issues!