Updating Stream Deck key colors

I have Streamdeck working well with Home Assistant, using the StreamDeck application running on my machine with WebSockets.

I can display values on the keys and perform actions via Home Assistant on key press.

What I’d like to do is change the color of the text for a value in a key; for example, I have a fridge temperature which is generally between 3.6 and 4.0 degrees. The text is white on black, I want the text to be blue if value < 3.6 and red if > 4.0

Has anyone done this, or does anyone know if this can be done?