Obviously she means the weird blue background, Todd.

↓ Transcript
Ke Ban: Thank you, everyone! We hope you enjoyed our dance!

Ke Nan: Everyone, please come join! Lets have fun!

Todd: That was very nice.

Selkie: Yeahs... buts I haves a question.

Selkie: Howd's hey make those colors?

Todd: Um what colors, Selkie?

The color is out of space