When creating a new mode, whatever color is selected at the time gets propogated to the whole palette for the mode.
What I'm trying to do:
Create new palettes that are variants for the colors; for instance
  • Light - Alpha .... all the same colors or the light mode with the opacity enabled
  • Dark - Alpha ... all the same colors of the dark mode with the opacity enabled
  • Light Grayscale ... all the same colors of light, with the saturation to 0
  • Dark Grayscale .... all the same colors of dark, with the saturation to 0