The vision of the Mantis Shrimp.
From wikkipedia:
Compared with the three types of photoreceptor cell that humans possess in their eyes, the eyes of a mantis shrimp have between 12 and 16 types of photoreceptor cells. Furthermore, some of these shrimp can tune the sensitivity of their long-wavelength colour vision to adapt to their environment.
Not sure what it would make the world around me look like but I would love to find out.