How about making music from liquid colour droplets?

"Audible color is an audio-visual instrument. Sound is generated based on color detected by a camera. Red, green and blue correspond with certain music notes. When the colors are mixed, the resulting secondary colors produce different notes. The size of the colors influences the volume and frequency of the notes played. Color detection and sound generation were created and are controlled using Processing code."

Designed by Hideaki Matsui and Momo Miyazaki

Found via http://createdigitalmusic.com/2012/07/tunes-in-drops-of-color-design-project-...

Minimalist RGB Transition

Mesmerizingly simple, love it.

A video image consists of three primary components - red, green and blue. For this work each component channel was fed a differently timed sequence of 50 common video transitions. As the three components recombine to create a video image; constantly changing forms and colours are revealed. Made by Timothy Evans in collaboration with Daniel Eatock. Found via http://www.triangulationblog.com/2011/11/rgb-transition.html

Who colour-coded Christmas?

"Santa's crimson and fur-lined coat? Shiny holly leaves and berries? Colourful poisonous, hallucinogenic mushrooms? Or medieval paintings in East Anglian churches? Just how did red, green and white become the conventional colours of Christmas?  Dr Spike Bucklow from Cambridge University's Hamilton Kerr Institute is questioning the common belief that the traditional festive shades are a legacy of the Victorians. For the past three years, he has researched the art history of medieval wooden rood screens in churches across Norfolk and Suffolk.  Here - from the bright rainbow palette of the 21st Century Christmas - he travels back in time to present a theory on who might have colour-coded Christmas." http://www.bbc.co.uk/news/magazine-16189761#

Christmas by Colour Project
Another interesting colour project is the 'Christmas by Colour' project's exploration into the colours that shape Christmas - by Mancherster based design agency Raw http://www.weareraw.co.uk/

Frustrated at the plethora of Christmas reds, whites and greens Raw decided to explore the colours people really associate with their Christmas. Thousands of people from around the world embraced the project and relished the opportunity to suggest their own colour and its personal meaning. Raw then handpicked the best to go on their nice list and be featured on the popular Pantone-inspired A1 poster." http://www.christmasbycolour.co.uk

Zinging Landscapes by Jonathan Zawada

"An exhibition of large scale drawings and oil paintings at Prism Gallery, Los Angeles from December 16, 2010 – February 28, 2011. The landscape topographies were derived from graph data, modeled in 3D and then oil paintings created from those 3D renders." 

See more of his work http://zawada.com.au/2010/12/over-time/ - found via http://blog.2modern.com/2011/05/jonathan-zawada-painting.html