I think there should be a collaboration out there for every color that way it's easy for hitRECorders to find images/videos/poems/stories/anything involving the specific color they're looking for.
This is the collaboration for blue. It doesn't just have to be images. If blue makes you feel a certain way, write about it! In particular for blue, people could add blues music. Or write about something that made them feel "blue".
This is a chance to be creative and stretch the concept of blue.