Sylvania Bulbs - How do I Get to White in the Smartthings App?

I just installed two Sylvania LED retrofits that produce full color. I love them, but, my issue is, when I am programming scenes or even just operating the light, it’s hard to use the app to just make the lights plain white. With 16m colors available in a circle it’s hard to get to just plain white when I’m telling the app to do a scene. Is there a way to select from a few pre-set common colors? Or to type in an RGB or Hex code or something for the color I need?

Right now I cannot change the colors because once I change (say to red) then it’s impossible to get the bulb back to a perfect white using the interface.

choose color temperature instead of color control

Color Temp 2700K or whatever temp you like.