The reason that looks much better isn't the colours so much as he's used whatever image editing tool he's used to bring the shoulders 'in' compared to the actual picture we've seen (which was mine and many others main complaint), and added cannons on the back which give a sense of a larger scale. Compare the two
(photoshopped) http://www.tfw2005.com/boards/attach...igure-blue.jpg
(original) http://www.tfw2005.com/transformers-...1328675996.jpg