How do I make a color wheel?

What kills me is that I've already done this, years ago. I can't remember how I did it, nor can I figure out how to do it from scratch. I think there's something wrong with me.

I've already got one with twelve individual slices. That one is perfect.

I need to make another with six slices.Maybe I could take the old one and delete lines between adjacent slices, then join nodes along the curves and at the corners, but what I really need to do is make a six-slice color wheel from scratch.

Every time I start planning, I hit a wall.

If you have the time, I could use some help figuring this out.

Thank you, and have a great day!