Razer.com Chroma demo vs Synapse 3 (Razer Blade 15)

Hey guys,
at https://www.razer.com/chroma the demo change Parts of my Keyboard.
I own a Razer Blade 15 Base Model, it has a Single Zone Chroma Keyboard.
Thats okay, but the demo change parts of it and in Chroma Studio i can only change the whole Keyboard.
Is there a feature i missed?
I don´t mean to change the color of different parts, but some parts a dark and others are bright.

So it must be a Synapse 3 restriction not hardware right?

Can someone explain that to me?
Greetings.