  We have performed broadband color photometry of the twelve brightest
irregular satellites of Saturn with the goal of understanding their surface
composition, as well as their physical relationship. We find that the
satellites have a wide variety of different surface colors, from the negative
spectral slopes of the two retrograde satellites S IX Phoebe (S'=-2.5+/-0.4
%/100nm) and S XXV Mundilfari (S'=-5.0+/-1.9 %/100nm) to the fairly red slope
of S XXII Ijiraq (S'=19.5+/-0.9 %/100nm). We further find that there exist a
correlation between dynamical families and spectral slope, with the prograde
clusters, the Gallic and Inuit, showing tight clustering in colors among most
of their members. The retrograde objects are dynamically and physically more
dispersed, but some internal structure is apparent.
