Pick a colour, any you like. Now picture it in your head. Easy enough, right? Now picture a colour that doesn’t exist. Something brighter than white, or perhaps darker than black. It seems impossible, but it can be done.
Chimerical colours are shades that cannot exist in the real-world, but can be perceived due to the way in which our eyes see colour. They are part of a larger collection of hues called impossible colours.
To understand how chimerical colours work, we need to understand how we see colour in the first place. (If you want to skip straight to the demo, scroll to the bottom!)