Just my thoughts on what would match this kind of music. The music is a bit heavy for a younger skater, but if she likes the music, then go for it.
Remember seeing a sunset on a somewhat cloudy day ? Remember the color combination at twilight ? Most of the sky would be dark blue, but some of the clouds around where the sun went down would still be light or dark gray, but tinged with pink or orange. Plus the horizon where the sun went down would still be medium blue. Now can you find a dress that has the colors blended together, similar to tie dyed material. Except the blended colors would be the colors of the twilight, namely predominately dark blue with an area of lighter blue here and there, but accented with strips, or small rivers, of pink, orange, and light and / or dark gray. Maybe there would be a half moon patch of yellow to mark the sliver or crescent of the sun. This is what I think of when I hear that music.
You are to be commended on trying to match her skating dress to this somber or darker kind of music. As an ISI judge, I see some simply awful ' music to dress color / style ' matches, like one time I saw a little girl skater wearing a skating dress that made her look like a Renascence princess, but her freestyle music was country / western.