You don't have to say that, just say "turn on warm white". Scene is not designed for single device adjustment actually, it's some state of your entire lighting (for example, a scene named "movie" could be: turn off main lights, turn your light strip to blue color. When you want to watch movie, just say "turn on movie").
BTW, per Alexa certification, an account can only create at most 12 scenes, so please be conservative in scene creation, leave it to most common case, e.g. "leave home" instead of "pink".