Linking background image to theme color?

I’m using 1.7.13 currently. I tried linking the BG color to the theme color… i.e. “Blue theme” color scheme selected sets the background “blue.png”, “Red theme” selected sets the background “red.png” instead… but I seem to only be able to set them seperately. Is there any way to do this?

To update… I managed to work around this. Not perfect, but close enough.
The base background (that is not supposed to change colors) was put at the backmost layer. The areas that should change color were placed on top as a transparent layer with just the areas to be colored in grayscale. When applying the theme color to the grayscale layer, those parts change color as needed.

are you using seperate background image for each theme? Or are you just changing the color of the png file?

One background for all themes in gray/white (since I couldn’t figure out how to set a different BG for each theme color), then selected that image to have the theme colors. It will overlay the theme color and all gray and white areas will change color.

As far as I could find there is no way to link a background image to a theme from WFS. But you can create a style for the Background image and let the user choose between them separately (separate from theme colors). You may checkout this Code Lab:
Customize styles of a watch face with Watch Face Studio | Samsung Developer

It can be done (hackily) using WFF, but not using WFS. I’ve published a couple of faces in which selecting a theme specifies which .PNG to use (as well as colours).

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