Accessing Category Custom Field at Post level in Elementor

I am using Elementor to develop a site and I would like to accomplish the following:

1. Add a customs field to post categories, to assign a color and an image
2. Access the fields for image and color in single post Elementor template
3. Access the fields for image and color in a post listing Elementor template

I am able to create the fields easily enough, but am having trouble getting them to work with Elementor dynamic tags. I can see and select the field names but the colors don't change and the image does not display.

I would also be open to approach tis a different way. Anyone have any ideas?

Ian