40 # The 7th colour

Aradhya's POV 

I ran towards the study to find out. When I reached there, it's terrible for me that the huge lock is hanging on the door. The door was quite old but strong and beautifully designed.
I found a note, "You will find the key from the study."
I sighed hard and put my hands on my waist, "Huh, what should be in the last 7th colour?"