## 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):

[![enter image description here][1]][1]

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.


  [1]: https://i.sstatic.net/QKa7x.png