card_example.yaml

- type: entities
  entities:
    - entity: sensor.chmi_alert
  card_mod:
    style:
      hui-sensor-entity-row$:
        hui-generic-entity-row$: |
          .value { 
            font-weight: bold; font-size: 1.6em; 
            {% if state_attr('sensor.chmi_alert', 'severityLevel') == 0 %} 
              color: #28d861 !important; /* no alert */
            {% endif %} 
            {% if state_attr('sensor.chmi_alert', 'severityLevel') == 1 %} 
              color: #99ff00 !important; /* unknown/outlook */
            {% endif %} 
            {% if state_attr('sensor.chmi_alert', 'severityLevel') == 2 %} 
              color: #99ff00 !important; /* minor */
            {% endif %} 
            {% if state_attr('sensor.chmi_alert', 'severityLevel') == 3 %} 
              color: #ffff00 !important; /* moderate */
            {% endif %}
            {% if state_attr('sensor.chmi_alert', 'severityLevel') == 4 %} 
              color: #f38a39 !important; /* severe */
            {% endif %} 
            {% if state_attr('sensor.chmi_alert', 'severityLevel') == 5 %} 
              color: #ff0000 !important; /* extreme */
            {% endif %}