This project provides the colour definitions introduced by the ColorBrewer project for use in TikZ and pgfplots.
Simply put the files in a directory where LaTeX can find your files. On linux,
for example, put these files in ~/texmf/tex/latex/colorbrewer/ (you might have
to create the directory). Then run texhash to update the definitions.
There are two example files display_colorcycle.tex and display_colors.tex
which illustrate the usage. The second example outputs a list of all colours.