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(Abridged) New optical colors of 58 objects in mean motion resonances withNeptune show the various resonant populations have significantly differentcolor distributions. The 5:3 and 7:4 resonances have semi-major axes near themiddle of the main Kuiper Belt and both are dominated by ultra-red material.The 5:3 and 7:4 resonances have statistically the same color distribution asthe low inclination "cold" classical belt. The inner 4:3 and distant 5:2resonances have objects with mostly moderately red colors, similar to thescattered and detached disk populations. The 2:1 resonance, which is near theouter edge of the main Kuiper Belt, has a large range of colors with similarnumbers of moderately red and ultra-red objects at all inclinations. The inner3:2 resonance, like the outer 2:1, has a large range of objects from neutral toultra-red. The Neptune Trojans (1:1 resonance) are only slightly red, similarto the Jupiter Trojans. The inner 5:4 resonance only has four objects withmeasured colors but shows equal numbers of ultra-red and moderately redobjects. The 9:5, 12:5, 7:3, 3:1 and 11:3 resonances do not have reliable colordistribution statistics, though it appears noteworthy that all three of themeasured 3:1 objects have only moderately red colors, similar to the 4:3 and5:2 resonances. The different color distributions are likely a result from thedisruption of the primordial Kuiper Belt from the scattering and migration ofthe giant planets. The few low inclination objects known in the outer 2:1 and5:2 resonances are mostly only moderately red. This suggests if the 2:1 and 5:2have a cold low inclination component, the objects likely had a significantlydifferent origin than the ultra-red dominated cold components of the coldclassical belt and 5:3 and 7:4 resonances.

The Color Differences of Kuiper Belt Objects in Resonance with Neptune