OK this intrigued me since the comments here were a bit strange regarding something as suspect as IQ tests online.

2 of the people commenting and the poster have almost exactly the same upvote history. Where one is https://hexcolor.co/color-picker which links to this IQ site if you hang around for a bit.

The colour picker link also links to https://organichits.co which as the exact same design as this IQ site. Taking the nature of that site in to consideration, I'm giving this a pass.