I have a convention of creating global CSS variables that use a primary brand hue to automatically generate a visually pleasing color palette. In the old color picker, I just used "var(--color-primary)" and it worked flawlessly. The new one does not allow me to do that, but I've found a workaround by creating custom fields for "var(--color)" and then using that in the color picker and declaring the variable value in the custom CSS. This is fine, but it's a huge pain in the @$$. I do like the new color picker interface, but it would be nice to still allow the css variables. (This is also a great case for global stylesheets)