Nocturnal animals function by having a large proportion of rods. This was true of our anthropoid ancestors, resulting in humans having very limited high acuity

Nocturnal animals function by having a large proportion of rods. This was true of our anthropoid ancestors, resulting in humans having very limited high acuity color vision. We get round this by rapidly scanning and stitching the world together (the inability to do this is a sore problem for visual prosthesis). That the world seems sharp and rich in color is a testament to the feats of predictive inference our brains regularly perform.