How to show default icon and default color

[woobenjamin]

Hi,
First, thank you for the card. I love it.
I have a light and I want to use a specific color for the off state. I've been successful at doing that. However, when I turn it on, I want to use the default colors from HA, as it shows me what color the light is set at and an indication of how bright it is. How can do this?
Also, how can I use the default icon rather than defining it in the banner-card?

Thanks in advance.