Support for colour temperature / CCT

Hi,
I know that RGB devices are supported, and we can Homekit supports white colour temp setting as well as RGB using the colour wheel, but when setting the white colour temperature this is converting the temperature into RGB values to send back to Indigo.
Is it possible to have the actual K white temperature sent back to Indigo for devices that dont have supportsRGB = True but do have SupportsWhiteTemperature.

Ideally I would like to be able to set white via cool and warm sliders in one device but assuming Homekit doesnt support this so will settle for temperature and some fun calculations in my (in dev) plugin.

The idea being that we can set explicit temperture in Homekit to then control white only devices.

Thanks