Breathtaking. Would make an amazing print, or even blown up as wallpaper.
The hubble site has more info, with high-res files for download.
Exposure Date(s): July 2010 - October 2013
Total Exposure Time: 394 hours (16.1 days)
Credit: NASA, ESA, J. Dalcanton, B.F. Williams, and L.C. Johnson (University of Washington), the PHAT team, and R. Gendler
Colors: These images are composites of separate exposures acquired by the ACS instrument on the Hubble Space Telescope. Several filters were used to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are:
F475W (g) blue
F814W (I) yellow