I couldent figure out a way to edit the colors in the search but you can in the dashboards. I don't think you can in search.
Search:
| sort - time | eval VioletTimes>1.5sec = if (time>1.5,time ,0) | eval RedTimes>1sec = if(time <=1.5 AND time >1,time ,0) | eval OrangeTimes>750ms = if(time <=1 AND time >0.75,time ,0) | eval .YellowTimes>500ms = if(time <=0.75 AND time >0.5,time ,0) | eval .NormalTimes<500ms = if(time <=0.5, time , 0) | fields - time
XML edit on dashboard
{"VioletTimes>1.5sec":0x8B2252, "RedTimes>1sec":0xFF0000, "OrangeTimes>750ms":0xFFA500, ".YellowTimes>500ms":0xFFFF00, ".NormalTimes<500ms":0x73A550}
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