Abstract: The psychophysics of trichromatic color vision have been well understood for over a century, enabling predictions about biological mechanisms in the visual system that were only confirmed many decades later.  Despite a good understanding of how olfactory receptors work and the outlines of how they integrate information in the olfactory system, we lack analogous understanding of smell perception.  Unlike in color vision, we do not yet know the fundamental relationship between the physical character of the stimulus and the percept it evokes, nor do we know if or how simple perceptual primaries can be mixed to produce arbitrary percepts.  I will talk about recent progress on these problems in olfaction from my lab and among my collaborators, made possible by open science.