The Munsell color system might be a little complicated for some students, but this system is a great way to show how hue, chroma, and value can describe colors.
You can read more about Munsell’s color system here. This animation shows the full range of colors that make up the Munsell color tree. In the third diagram, you see a tint and shade for each hue floating around the value scale at the core of the Munsell color tree. Other colors, such as violet, are naturally darker, so you will see violet set lower than the circle of colors. Some colors, such as yellow, are naturally lighter, so you will see it placed higher in the second diagram (in the middle above). So Y5 is a yellow in the middle of the value scale, and Y8 is a lighter yellow or a tint of yellow higher in the value scale.
Munsell assigned a number to each value, with black as number 1 and white as number 10. At the core of color arrangement, you will see a value scale with ten levels of value, beginning with the lightest values on top. Value refers to the light or dark of a color.
The second diagram adds the variable of value.