[Feature]: Light Card : Default color if RGB is set to white

[nuggie]

Is your feature request related to a problem?

It would be great to style the "white" color in the normal slider colors with rgb lights.

Describe the solution you'd like

I have a room with normal warm-white LED spots and RGB LED spots. When I just use the "white" channel of a RGB light it would be great to have the slider in the same color as the warm-white LED lights. "Schrankwand" is a normal warm-white LED spot and "Kamin" is a RGB LED spot where only the white channel is turned on.

But this should only happen for the default white channel ... if I set any color it would be nice to see the color on the slider as it is.

Describe alternatives you've considered

No response

Additional context

No response