Two colors for branding limits our options. I'd like to request additional options to add colors, but with each color used for specific purposes. Colors for buttons, hover colors, border colors, etc.
I'm sharing a link to how this gets implemented on the Kadence theme for WordPress to demonstrate what I have in mind.
https://www.kadencewp.com/kadence-theme/knowledge-base/customize-settings/how-to-use-the-kadence-theme-color-palette/