Add coloring of symbols according to state for the FYTA integration

Please add support for the coloring of symbols according to state in the FYTA integration.

Symbols? Do you mean icons, or something else?

Yes, I mean the icons. In the German App these are called symbols.

Just wanted to share that I’ve implemented icon color-coding in my custom Fyta plant card based on sensor status.

Icons change to green for “perfect” conditions, yellow for states needing attention, and red for critical readings.