Notes:

These are the children of Fates in their Royal mother's (from left to right Camilla, Elise, Hinoka, and Sakura) hair color.

The children listed from top to bottom are as follows

Kanna (F)
Kanna (M)
Deere
Sophie
Midoriko
Soleil/Gurei
Ophelia/Mitama
Eponine/Hisame
Lutz/Matoi
Ignis/Syalla
Velour/Kinu
Shinonome/Siegbert
Kisaragi/Foleo

So in your opinion, which hair color looks great on what kid and which hair color looks like s--- on what kid?

The Children of Fates in the hair colors of all their mothers can be found here.