
09/29/2025
Ever wonder why some people can’t tell red from green, or blue from yellow? For many, it’s more than just a simple mix-up—it’s in their DNA. Color vision depends on special cells in the eye called cone cells. When certain genes like OPN1LW and OPN1MW, which help build these cells, don’t work as expected, it can affect how red and green hues appear. These genes sit on the X chromosome—so it’s more common in men.
Whether it’s seeing red as dull brown or mistaking blue for green, color vision differences can show up in many ways. From inherited traits to age-related changes, your color perception might be more personal than you think.
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