One colour challenge

I drew this picture spontaneously and liked it so much that I made it a challenge. So, the rules are: 》You are only allowed to use ONE COLOUR, you choose which one 》You get to choose ONE OTHER COLOUR for things like details and stuff that wouldn't be visible otherwise 》You also get to use BLACK AND WHITE, if you need to There's no deadline or price, but I will give you feedback in form of a comment if you decide to participate. Have fun!🎨✍

oceanbluedevil