Problem with changing dynamically the color

I want to change the color of the value dynamically butit doesn’t work

here is my item

Number MQTT_number_weewx_outTemp_C "Aussentemperatur [%.1f °C]" <temperature> (group_climate) {channel="mqtt:topic:weather:outTemp_C"}

my sitemap

Text item=MQTT_number_weewx_outTemp_C label="Aussentemperatur [%.1f °C]" valuecolor=[>=25="red",<=20="green",<=15="blue"]

what’s wrong???

What is not working?
From the look on your code I guess you wil never see a blue value ( because values below 15 are also below 20, so they are shown in green).

It is Always black… @opus

Sorry, other then the above I don’t see anything wrong.
Can’t test ATM, on the road via bicycle.

it is working now

For others reading your post it would be of interest how you did solve the problem.

Text item=MQTT_number_weewx_outTemp_C label="Aussentemperatur [%.1f °C]" valuecolor=[Last_Update=="Uninitialized"="gray",>=25="orange", >=15="green", 0="white", <15="blue"]