Digital Guide to Photography 11 (exclusive) - published by John Houck, 2011 4,095 Combinations of a 2 x 2 Grid, Colors: #F3FCEB #6A7476 #5F7D75 #596561 #3F6B78 #8DB3BC #EDE9C3 #AA9C33. http://www.johnhouck.com/
