Frontend (theming) has paper-item-icon-color and paper-item-active-icon-color, so we can use state_color: true and have that applied via our themes. This is default for ‘off/on’ states.
it would however be even better if we could make several ‘alerts’ standout, (device_class: problem etc) with an alert_color set in a theme.
As automation/boolean and regular binary now can use state_color: true, an alert_color: true could be set for the ‘problem’ binaries. Several device_classes could benefit from that.
Please consider adding that to the core theme scheme?
related FR/Discussion add alert-color variable for applicable device_classes · Discussion #12207 · home-assistant/frontend · GitHub