How did the TV drama series 'Utopia' achieve it's comic book look in post-production?

The channel 4 TV drama series 'Utopia' is very different to other TV series that have been produced and released .
One reason that Utopia achieved it's comic book look is because of the bright, iluminous colours throughout all episodes in every series. The channel 4 thriller's hyper-real violence is a use of colour unlike any other TV show. A range of different colours are used in this thriller. The director, Marc Munden, turned to the Technicolour palette of 1950's hollywood in order to replicate the graphic novel's bold aesthetic. For example; they made dull british sky extremely blue through editing, even when it wasn't a bright day. They made the grass greener and the characters eyes brighter using special editing effects. This is because this technique seemed to impress the audience and enticed more to start watching.
In series 2 , the colours  of yellow, magenta and cyan were made bolder in post-production. This seemed to help draw in a larger audience to begin watching the bright drama series.