[quote=@Raijinslayer]
[@t2wave]I would suggest that, since Marlene's base crystal is pink, that pink would be a go to option, but maybe you should have so that the colors can change depending on what type of crystal she uses, or maybe the colors scheme displays the types of crystal she can use. 
[/quote]

[quote=@Zarkun]
<Snipped quote by Raijinslayer>

Except pink is Ariel's charm magic.

<Snipped quote by t2wave>

Perhaps a shade of purple?
[/quote]

Ariel typically does not exhibit the same breadth of utility as the original. So Ariel would probably only have one color.