How to change assets to make another theme?

I want to create a watch face in which it will be possible to change the color of elements.
I know how to add a background changing and a button to change it.
But I don’t know how to create a system to change other elements.

So far it is:

I can change the background asset, but the assets of the elements remain in the same color - each element is a set of separate images:

I want it to be like this:

Each time, along with the background asset, the assets of the elements change to those of the appropriate color.

The problem is the watch hands are 360 so they cover up any tap action to change the layer below them. There was a way to do this in an older version of Galaxy Watch Studio. But I don’t remember what version it was.

You can use Themes to set these in Galaxy Watch4 with Watch Face Studio.