I believe that everything in this world is conjured in our minds
We've created this world, what rules and laws it governs, the Earth and the universe, EVERYTHING we sense are actually stored in what we believe are our minds (not necessarily our brains) in the consciousness we have (or maybe "soul"). We are all different consciousness who perceive the same world, synchronized all the way down to the smallest unit. We do not discover new things, we just come across something our lifetime saw as new but in truth, we just recalled a bit of information we had once kept stored in secret in our consciousness' powerful mind.
With that, perhaps the blue you're seeing is not the same blue I'm seeing, yet we all interpret it the same way, as we all say it's blue. The world is but an illusion we've conjured in our collective minds.