If you have a api post about your planet on this forum that also contained the color data when you finalized it, you could reference your post for your list of colors. It won’t update until someone actually scans the planet after color changes and then the post has to be modified, so its a manual process.
For example: [Gaia] --[T6 - Fierce Coal Sovereign World]-- [Active]
Its a good workaround until the devs do add such a thing should they want to.