Researchers made subjects perceive a brand new color by stimulating their middle-wavelength-sensing cones in a much more selective manner than usual light can

https://gizmodo.com/scientists-learned-how-to-trick-our-eyes-into-seeing-an-entirely-new-color-2000591389

Will we see a use for this before 2026?

Doesn't seem too hard to make and I could see some uses, starting with eye-catching advertising