Date calculation alert

first i wanna thanks all the Axelor staf and the members of this fabulous erp sytem.

i have a question : so in model building i have 2 dates .want add a field related to the 2 dates : wwhen for ex. date 1 - date 2 = < 30 days or 1 month … the field show STATE in red color. if > 30 STATE in green colour. as expiration date notifification in the row of liste.

Please check the hilite feature for this