##Ruby, 77 bytes
Ruby, 77 bytes
puts"P3\n78 52\n255","#{"0 85 164 "*26+"255 255 255 "*26+"239 65 53 "*26}"*52
Output (converted to png, since ppm doesn't seem to be supported):
Outputs in ppm format to STDOUT. Still working on plusgolfing. I know ppm can take bytes instead of ascii, but I haven't figured out a good way to do that yet.