The Lego World Map contains 11,695 Lego pieces. The land areas are meant to be colored in white,
but for the oceans they encourage creativity.
The map is a grid and therefore lends itself to being replicated in Excel as Jon Schwabish of PolicyViz has done. He assigned a color for each grid cell based on the LEGO palette. In this article he describes the process and lets makes his Excel file available for download. Here is a close up.
So you can take this color by numbers approach to make your own creative spin on the world. My artistic skills are limited but here was a quick pass at it.