you always had your hair blue, simply because you loved the color blue and couldn't necessarily bring yourself to change it to a different color, it was a part of your appearance and it was something hyunjin was used to so when you dyed it, he was quick to notice.

hyunjin stared at you, his brows furrowed slightly, "where's the blue?" he asked, moving to the side, maybe you only dyed the top and left the bottom blue? nope, it was fully black.