"Huh." Slipstream leans in a little, peering at the spark, though not so close that close that it looks like she's going to make a grab at it or anything like that. "Are sparks usually green where you're from? Or are you bad and special?"

She has to admit, she has no memory of sparks being anything but blue, regardless of who they're in... but she also had no memories of Energon being anything but bright pink (and incredibly dangerous) before arriving here. Who knows what colors sparks might come in in other universes?