RGBWWZ how to convert color

[sonar98]

I have a RGBWW dimmer in Domoticz and want to control it with Google Home.

Switching it on/off and setting brightness level is working.
Now I want to be able to change the color.

This is what I get from Domoticz:

Smartnora changes it into this:

Domoticz does not understand spectrumRgb: 4251856.
How can I convert it to the format Domoticz understands?

[sonar98]

Nevermind. Found a solution.
Domotics accepts the hex value.

using .toString(16) fixed it for me.