Hi,

in a document I want to add a bar chart. This document will
is a paper and later converted to pdf. In the diagram I will
have tree groups with 4 bars each. My question:
which color would you take for the 4 adjacent bars? And what
DPI? The diagram (figure in eps format) will be relatively
small and I want that the reader can still distinguish among
the bars when the paper is printed. Are there any preferred
combinations of colors due to the "theory of colors"?

Thank you.

Chris