Anyway, This was a reference I did way back when for my basic designs for the colors! I usually iterate designs until I settle on my final over time, so this was one of my first (and thus the most boring) versions for them.
Some of the stuff that has stayed the same is: Vio has long hair and is overall very pale. They also prefer wearing darker colors and have some sort of item from Shadow as an earring. His 'purple' color is actually violet as well, so it's pinker than 'normal purple.' Blue's hair is less saturated and darker as well, he keeps it pushed back. It's kind of spiky. He also has very angular eyes. Green's hair is super fluffy, and it's the brightest yellow of them all. His hair is also sort of like Minish Cap Link's in style. He wears Zeffa's feathers as well. Red has strawberry blonde hair, and keeps in a ponytail like Minish Cap Link! It has the same gravity defying spring, except Red's emulates the spikes of the Fire Element. His hair is also very curly, and he likes foregoing sleeves. Four is Four. Shadow has purple hair, and it's a lot bluer than Vio's signature color. He also has darker skin, and is based off of @kaenith's design since I love it so much. His hair has a side part like Minish Cap Link, because he's based off of the original Link and not Four (who is not quite the same in my mind). He also has short sleeves like Minish Cap Link's clothes. All of them have some variant of grey eyes. The colors share the same eye color, but Four's eyes are almost opalescent, and Shadow's are glowing silver/white kind of like the moon. Of course, he can change the color since he's a shapeshifter.