Here’s one approach I’ve found, which is based on the gamut mask idea, but a little simpler and tuned to working in PS:
1. Start with three color swatches: a red/magenta of some kind, a yellow of some kind, and a blue/cyan of some kind. They don’t have to be crayon-box “red” “yellow” “blue” — the nice thing here is that you can decide how warm or cool you want the overall cast of the color to be. So, for instance, you could pick a cool yellow, a purplish red, and an electric blue. Or a very orange red, a warm yellow, and a greenish blue. Or even substitute green for blue. Experiment here. Even colors which are completely hideous will mellow out, so don’t be afraid.
2. Draw your 3 swatches in a tight triangle so that they are bumping up against each other in the center. Then use a smudge tool with scattering on for a blender, and blend the edges of each color into each other:
(I also had pressure set so I wouldn’t blend too hard, but that’s optional. Scattering is the important one.)
3. Now you have a neutralized color wheel. The closer toward the center you go, the more neutral the palette becomes:
(here they all are against 50% gray)
4. Now you can start establishing the values for the colors you might want to use. Use the L (Lightness) with Lab sliders on the color panel (even if you’re using RGB or CMYK color for your document) because “Brightness” (HSB) is a load of horseshit.
5. By the way, here’s what the color wheels from those other colors from the beginning would look like:
And one other with more swatches:
I AM HORRIBLE WITH COLOR PALLETS THIS WILL HOPEFULLY HELP ME.