Problem with changing dynamically the color

Setup, Configuration and Use Beginners
1

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???

2

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).

3

It is Always black… @opus

4

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

5

it is working now

6

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

7 
Text item=MQTT_number_weewx_outTemp_C label="Aussentemperatur [%.1f °C]" valuecolor=[Last_Update=="Uninitialized"="gray",>=25="orange", >=15="green", 0="white", <15="blue"]