There are several colors mentioned in the documentation at https://aps.autodesk.com/en/docs/acc/v1/reference/http/assets-asset-statuses-POST/ which are not available in the GUI. Please make these colors which are listed in the API documentation available in the GUI too:
adsk-charcoal-800, adsk-charcoal-700, adsk-charcoal-600, adsk-charcoal-400, adsk-charcoal-300, adsk-charcoal-100, adsk-charcoal-50, adsk-red-300, adsk-salmon-700. adsk-salmon-500, adsk-green-300, adsk-blue-300, adsk-pink-700, adsk-turquoise-500, adsk-purple-500, adsk-brown-700, adsk-brown-300, adsk-dark-blue-700, adsk-dark-blue-500, adsk-dark-blue-300, adsk-white, adsk-black