Not too many years ago, I took a class from Beth Brown-Reinsel in which I learned to cast on with two colors. I'd almost forgotten about the technique even though I see my work weekly. As it turns out, I personally do not have much use for wool wrist warmers. Neck warmth is what I need most often. But that is another story.
Back to the two color cast on and why I see it all the time, but forget that I know how to do it.
It turns out that the wrist warmer fits a favorite water bottle perfectly! This is bottle, suitable adorned, is my constant companion at knit groups.
So why do I forget about the techniques displayed in the fab sample of color work?
A little bit of green in the cast on and then blocks of green marching about the hat.
Always remember, and don't ever forget, we know more than we do.