The language of emojis is like the language of colors. They both communicate without words. This article compares their powers.
There are more than 2,823 emojis set by the Unicode Consortium and more are coming soon. Apple just announced a preview of those approved earlier this year as part of the Emoji 13.0 release by the Consortium. The dodo bird, piñata, and a ninja are three examples. Which one would you add to your vocabulary?
The normal human eye can theoretically distinguish 7.5 and 10 million hues. New pigments, such as YinMn Blue, have been discovered. Also, Pantone and paint manufacturing companies frequently add new color swatches to their collections.
On the other hand, it’s scientifically impossible that a human being might see a color that’s never existed before. Our eyes can only see a specific portion of the electromagnetic spectrum because the visible colors on planet Earth originate from the light emitted by the sun. More information here and from Wikipedia.
If humans could visit a planet around another star - and depending on that star's color and the conditions of the planet’s atmosphere - a new world of color could be revealed. There’s also the possibility that evolutionary changes in human eyes will allow us to see broader areas of the light spectrum, in which case the brain will interpret this new information as a new color.