What are the darkest colors in a value scale called?

In a black and white photo, white is the lightest value, and black is the darkest value.

Explanation:

Between the lightest value (white) and the darkest (black), there are shades of gray in between.

P.S. I don't know much about art but I hope this helps!

In a black and white photo, white is the lightest value, and black is the darkest value. There are shades of gray in between that range from white to black. Allow students to observe a value scale to see white gradually change to black!