What do the annotations on the score when I sight sing mean?

[clarkxzhang]

Hi everyone, what do the annotations on the score when I sight sing mean?
I'm guessing that yellow means slightly off key but acceptable while red means way off?
I'm guessing this based on the fact that the red arrows seem to count as wrong notes while the yellow arrows don't (see the screenshot below)

[Quentin]

Hi,

The blue curve is a visual representation of the pitches you have sung. The upward/downward arrows indicate whether you sang to high or too low. If the arrow is yellow, the sung note was a bit off-pitch and is counted as partially correct. If it's red, it means that in average, the sung note deviated more than a quarter tone from the target note, and therefore it's counted as an error. The green checkmarks mean that the sung notes were on pitch.