Another option: purchase a teal MagicBand skin (see links below) ahead of time and if she changes her mind about what color she wants, no harm, no foul: just don't put it on (or if you have already put it on, peel it off.)
We got an offer code for free MagicYourBand skins a few years ago as a promotion when we rented DVC points from David's Vacation Rentals. We loved them so much that we buy them for every trip now. There are many other companies that make them, as well, if you want to shop around for other designs. (For the ones below, cost is $6-$7 and you get a set of two skins -- so if one doesn't adhere well or you make a mistake putting it on, you have a backup.)
This MagicBand 2 Skin is teal gloss to make a striking statement.
www.magicyourband.com
Glitter and sparkle in this shimmering ultra teal glitter MagicBand Skin.
www.magicyourband.com
You'll find a teal camouflage pattern on this MagicBand 2 Skin.
www.magicyourband.com
You'll find a aquamarine camouflage pattern on this MagicBand 2 Skin.
www.magicyourband.com