How to display certain background colors for single value visualizations based on search results?

[JoshuaJohn]

I am trying to make my search have 3 different background colors: Green if healthy, Yellow if warning, Red if critical. Right now all the code displays is the correct information without any colors. I took the query part out cause it was long and irrelevant

index="query"
| eval Level=if(Alert_Type="Critical",2,if(Alert_Type="Warning",1,0)) 
| eval key=Description.ID 
| stats dc(key) AS num max(Level) AS Level 
| eval count=if(Level=1,"Alert Level: Warning - Total Alerts: ".num,if(Level=2,"Alert Level: Critical - Total Alerts: ".num,"Alert Level: Healthy - Total Alerts: 0")) 
| eval Level=if(isnotnull(Level),Level,0) 
| eval myClassField=case(Level=2,"red",Level=1,"yellow",Level=0,"green") 
| table count Level myClassField 
| rename count AS "Health Summary"

Thanks for the help!

[somesoni2 · Accepted solution]

How about this

index="query"
| eval Level=if(Alert_Type="Critical",2,if(Alert_Type="Warning",1,0)) 
| eval key=Description.ID 
| stats dc(key) AS num max(Level) AS Level 
| eval  "Health Summary"=if(Level=1,"Alert Level: Warning - Total Alerts: ".num,if(Level=2,"Alert Level: Critical - Total Alerts: ".num,"Alert Level: Healthy - Total Alerts: 0")) | fillnull Level value=0 | rangemap field=Level severe=2-2 elevated=1-1 default=low
| table "Health Summary" range