Hello @Jan-Toth,
that is currently not possible. But you can have a digital indicator with many values, each value can have its own color. But you cannot change the text. This is helpful if you draw pipes of your heating system and you want to change the color of the pipes based on the temperature. Each pipe will be a digital indicator. Different values of the temperature would display different elements of the digital indicator - which would display different images (blue pipe, red pipe etc)
Martin