Background color determined by Value

[Zodiac69]

Hi All

I have made an Plugin for a WH24 Weather Station, based on "_P124_Ventus_W266_RFM69.ino"
Is there a way of changing the Value back ground color?
I would like the background color to change relative to the value.
The signals i am looking at is:
Temperature, Wind Speed, UVI and the RF receiver RSSI

Regards
Z