Top right:
An olive green, decently saturated and slightly darkened.
Top left:
A very low saturated purple
Bottom Right:
A low-medium saturated yellow.
Bottom Left:
A low saturation red that is brightened, a deep pink.
Pair 1:
The first color is lighter, more red, and a bit more saturated.
Pair 2:
The first color is a lot darker, and more saturated
Pair 3:
The first color is a lot lighter, more saturated, and more red than the second color.

+513 points (+
8 more required exercises for Grade 2.5.