The film has this overall "indie" appeal about it - that means it had a low budget quality about it, which is not uncommon considering its a Michael Cera and Ellen Page movie. This effect is clearly sought after as the choice of soundtrack, featuring the likes of Sonic Youth and The Moldy Peaches, combined with the 3D sketchbook font, similar to the 16 and Pregnant MTV series, gives a cool hipster-style feeling to it all. To top it off the choice of dry humour definitely worked with the characterisation of Juno and her relationship with her family.
From a design perspective, the Juno film poster was perfectly in line with the film's themes and 'artistry'. The title for one is the exact font used in the film, not unusual but still nice to look at and suggestive of the movie's indie effect. I'm not sure if its intentional but Nike's product placement is clear on this poster with Cera's trainers. Who knows? Maybe I pay attention to marketing messages too much.
The colour choice of the poster is orange on white, related to one comic theme within the movie of Tic Tacs, however, it is a colour tone I've seen used in film posters similar to this style of movie such as Adventureland and Little Miss Sunshine. It's probably a feel good colour that entices that type of audience to watch these types of film. After all orange spectrum colours are emotionally connected with happiness.
For those of you who have no idea what I'm talking about, here's the Juno trailer: