Tights vs. Compression shorts

[BillyMac]

What's the difference between compression shorts that go from the waist to above the knee, tights that go from the waist to below the knee, or a leg sleeve that goes from below the waist to above the knee?

And if one is able to correctly identify an equipment item as compression shorts, how does the NFHS define uniform color? The same color as the jersey (like an undershirt), or the same color as the shorts (like the old compression shorts rule)?

Silly NFHS monkeys.