At first, Steve didn’t notice that he could see too much, more than most people could. Before the serum, he’d been a bit colourblind, so how could he tell which new colours he was meant to see, and which he wasn’t?

Seeing in the infrared, he can finally understand what people mean when they describe someone as “glowing”. Nobody ever really explained that it’s a metaphor.

Birds and flowers are so colourful now! He can’t quite get the colours all down on paper when he draws, and people just think he’s being a bit fanciful with the patterns he gives them.