I'd suggest to change Flying Dash Aura Color for each class.
-Kaioken (for all)
Red Aura
-Human
No Trasformation: Default Color
SSJ: Gold Aura
-Namekian
No Transformation: White Aura or Purple/Green Aura
-Majin
No Trasformation: White or Pink Aura
Kid Bu: Pink Aura
(Example Aura Color (from DB Xenoverse) https://www.youtube.com/watch?v=eM0D6ZOj3xA)