Clint was a little mad at for giving Clint a headache a full night's worth of sleep, Clint put purple hairdye in Tony's shampoo and conditioner and went to grab some coffee waiting for Tony to shower. The archer couldn't wait to see Tony's reaction.
3 hours later:
Clint heard the shower and with confirmation from JARVIS amd a hidden camera grinned gleefully at the soon to be sweet revenge. Soon, Clint heard the water stop and knew that something big was going to occur.
"GUYS!" screamed Tony as he stood wrapped in a towel in the bathroom. All the Avengers ran into the bathroom and burst out laughing at the sight of Tony with purple hair. "Who did this? Whoever did this is going to feel my wrath." Said Tony angrily. The Avengers tried to put onn innocent faces, but failed. "I'm guessing on this one but 3 people will feel my wrath." Said Tony who then left the room