Blend two colors, using a hard edge, in an arc.

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(11-10-2021, 08:43 AM)rich2005 Wrote: Maybe something like this

A shape layer with an alpha lock
The gradient tool with a spiral shape. 
This is the awkward one, juggle the end points to get just part of the spiral showing.
Blend colour space CIE Lab
Gradient center point with Blending - Curved and adjusted to suit 

Thanks, Rich.

I made a rough draft of what you suggested and it's what I needed. It wasn't so much even the spirals but, the shape meeting another color and you gave me the basic concept of how to do it.  I'll go back and read your instructions more closely and make things look better on a background I make.