The key stone of the project is the Ecological Footprint, developed by Global Footprint Network. As such, we would like to keep the same color scheme of the organization's logo (see attached logo). Also, "steps" is in EUSTEPs, with an obvious connection to "Footprint"... Perhaps something to play with?
EUSTEPs is an academic program, so a certain level of institutional sobriety is prefered... with a twist, a wink, since it is about sustainability, education, youth, choosing possibility over doom-and-gloom... 

Thoughtfully followed the brief. 
Design talent. 
Responsive to multiple revision requests in a timely manner.
