An Instagram user, Otelia Carmen, has shared a video of a woolen hat that changes colour from maroon to brown, and then green, leaving netizens puzzled.
Carmen initially posted the video of the colour-changing hat on TikTok, where it has been viewed over six million times.
She posted the same video on Instagram, where she can be seen moving from one room to another holding the hat that changes colour: from maroon to brown and then to green.
Carmen said the apparent colour change was caused because of metamerism: when the colour of an item appears to change under different lighting.
“So, I bought this green hat at the store today and I brought it home and when I took it out, I was like: ‘Why is this brown?’ Then realised: metamerism. This is why lighting is so important in interior design,” Otelia said.
After watching this, one user commented, "This is insane," while another wrote, "I'm confused and entertained at the same time".