Philips WIZ Bulbs

[SmartHomePrimer]

You cannot control the color of the Trådfri bulbs from the HE to the Hue Integration for the same reason XY CIE instead of RGB.

Tradfri LED RGB bulb

Can't, for the same reason, they only report xy to hue, so that puts the xy conversion back on our end. xy -> hsl is possible of course, it's just beyond my tiny brain, and what I've tried off the internet was too inaccurate in my opinion.