[Circle/Transparent Layer Trick]

I was looking at [link]
I was trying to make those think yellow to red bands in the background.

I eventually came up with a fool proof way of doing it, which is to make 6-8 circles, small being yellow, and the largest also being yellow. Each new layer is reduced by 10 opacity, [90, 80, 70.. so on.] Doing it that way, you never really have to mess with hex values to make the color. The color, the gradient, comes from the background color, the deep red.

You never change the color of the first circle, and just make it slightly bigger[or even bigger depending on desired band size.] each time, reduce opacity by 10, and soon enough, you get that nifty band style. ... And then, I merged the layers, and used Liquidify, (I know thats wrong. I can't remember at the moment.) to make the uneven-ness in the circles.

Thats all

I've always had a hard time figuring out how the better Vector guys picked their colors. (This is probably an effect that everyone knows, but I just discovered it D:...)

Have a good one!