The Ocean Color Science Team at the National Environmental Satellite, Data, and Information Service (NESDIS) Center for Satellite Applications and Research (STAR) makes use of ocean color observing satellite systems in order to provide quantitative information relating to ocean biogeochemical parameters. The Marine Optical Buoy (MOBY) team maintains the primary in-water measurement site for on-orbit vicarious calibration of satellite ocean color sensors, including SeaWiFS, OCTS, POLDER, IRS1-MOS and MODIS. Recently, support has been requested from Japan and the ESA calibration teams for GLI and MERIS, respectively. The MOBY vicarious calibration water-leaving radiance reference is an essential element in the international effort to develop a global, multi-year time series of consistently calibrated ocean color products. The Ocean Color Biology group routinely evaluates the accuracy of operational products generated by NESDIS from satellite ocean color data, and develops algorithms for the production of beneficial ocean products. Through CoastWatch, the Ocean Color Science Team provides access of high-resolution, quality controlled and consistent coastal ocean color data in near-real time available to Federal, state and local marine scientists, coastal resource managers, and the public.