PicoCTF - GET aHEAD

Tried using Burpsuite on this one and I still cannot figure it out. I will take a look at some walkthroughs…​ Cheating, I know.

I used this writeup as a guide. I was actually on the right track. However, I only tried PUT and DELETE methods. HTTP request methods

Then, here’s the flag: (Pasted image 20221027121946.png)

Okay, so I thought with this hint (Pasted image 20221027122043.png) is that it referred to the colors so I tried using other colors through the POST request.