The intro for the SMTown Live lineup teaser featured all of SM's artists' emblems (a thing they started earlier this year, its like a fancy logo), including this one for aespa. I tried to get a screenshot of it but they were moving so fast this is the best I could do.
It features things we've seen before like the "be my æ" phrase and the member logos but the unique thing about this is the colors. All SM artists have official colors shown on their emblem (excluding the NCT subunits) Red Velvet features coral, SNSD has pink, suju has blue, etc. etc.
So my theory is, these are the official aespa colors, purple and light blue. We've seen quite a bit of purple in the black mamba mv, the debut teasers, promotional photos, and even stage outfits. But we've yet to see light blue anywhere. Maybe we''ll see more of these colors soon?
Idk, just a thought. This could mean nothing but it would be really cool if it does.