Mushroom Template card (in Declutting card), can I use html tags?

I have a decluttering card which is templating a mushroom template card and in the secondary field I have a variable callback. I would like to color that variable in the front end. How would I write it so that this works? I currently use card_mod to do some per card styling, I just need a way to wrap the variable to style it.

    - type: custom:decluttering-card
      template: title_card_template
      variables:
        - name: signalrgb lighting
        - secondary: 'Current Theme: {{ states(''sensor.signalrgb_batched_theme'') }}'
        - icon: led-on
        - icon-color: null
        - shape-color: null
        - primary-text-color: null
        - secondary-text-color: null