Change color of mdi icon?

Configuration
1

Hi
I have made myself an input_boolean that can be switched on / off to tell if I have taken my vitamins (lol, I know)
Together with that, I have made a template that show a thumbs up or down depending on the state of the input_boolean.

It looks like this:
image

But can I change the color of the thumb to green if it’s thumbs up and red if it’s thumbs down?

The template looks like this now:

  - platform: template
    sensors:
      vitaminer_tatt:
        friendly_name: "Tatt vitaminer i dag?"
        value_template: >-
          {% if is_state ('input_boolean.vitaminer_tatt', 'on') %}
            Good job
          {% elif is_state ('input_boolean.vitaminer_tatt', 'off') %}
            Not so good job
          {% endif %}
        icon_template: >-
          {% if is_state ('input_boolean.vitaminer_tatt', 'on') %}
            mdi:thumb-up
          {% elif is_state ('input_boolean.vitaminer_tatt', 'off') %}
            mdi:thumb-down
          {% endif %}

Thank you