After changing the lock design to this pastel red colour, i'm now starting to like it. However, i thought it made the image look a little flat, although the illustrations are 3D. I wanted to experiment layering colours together to see if that gave off a better effect.
By taking away the border and layering up the 3D red and blue colours, iv'e achieved this quite nice pastel grey/brown colour overlap in between. Not sure if this would be classed as using just two colours as they brief stated, but definitely getting some nicer results this way.
Making the overlap more subtle here. some, just has that slight blurred, 3D effect, works really well.
Making the colours much darker, still works well, but starts to get a bit hectic for the eyes to handle.
I like this outcome the most because of the colour scheme. I wanted to stick with the pastel red and blue colours as a running theme throughout each poster and by stiripping it down to just these colours printing on some nice stock (maybe newsprint) i think this will work the best.