The color of each performance category is based on the percentile of the score. For example, if a student's score is red, the score is below the 26th percentile. If a student's score is in green, it is above the 60th percentile.
Below are the default cut scores for each performance category.
The color-percentile table in your settings window (shown below) indicates the correspondence between the colors and the percentile ranges. Your school or district administrator can customize these settings based on your school or district policies. The cut scores you see may appear different on your screen than what you see illustrated here: