Generic RGB WC 5 channel light

I have a zigbee 5 channel led controller which allows to change colors as well as white temperature, i.e. RGB + Warm/Cold.

The current light integration only allows to set either an RGB value or a color temp value (using warm/cold channels). Setting e.g. a color temp automatically sets all RGB channels to 0.

I would like to control this dimmer using a 5 channel RGBWC service data attribute in the light integration.