Question about Philips Hue Signe Base BT

In the app under the respective lamp, you can move a slider around the entire spectrum and save the selected colour as the new standard via the menu at the top left.

In the Philips hue app, go to home, select the light or room, click on + add scene with your favourite colour, save and every time you turn on the lamp the colour remains or you can create more scenes to your liking

The lamp can be controlled here - like any HUE lamp from Philips - in any colour. The same app as usual