Which Philips Hue integration are you using? It looks like there’s an ‘official’ one where your Hue Bulbs would be connected to the Hue Bridge and a community developed integration where you can connect your Hue Bulbs directly to your Homey.
I haven’t personally tested either of these integrations, but does Homey expose a ‘device’ for the grouped Hue lights?
Otherwise, from a quick search of the Homey community, it seems like the < group > app is popular for creating groups of lights and controlling them together. From a quick test, it seemed to work quite well for your described use-case.
From the Homey app, just to show how the colors mirror across when controlled from the ‘group’ device:
Exactly what I tested and using now! The group-app within Homey pro works perfectly to group lights and use as u virtual single light-source. This light-source/device can be used in Sharptools perfectly. For everyone using Homey Pro I recommend this group-app and Sharptools the use for development of Dashboards.