After you define a KPI, will be awesome if you can color them:
* By expressions:
Red if number is less than 33.
Yellow if number is grater than 34 and less then 50.
Green if number is grater than 51.
* By scale:
A gradient from Red to Green (with yellow in the middle) and values from 0 to 100.
Just color this KPI number purple.
NOTE: Colors and values must be configured by user.