In reply to Danielle.

The SAS/STAT documentation has an entire chapter about choosing styles and attributes. The easiest way to use the JOURNAL style. For example, if you are writing to the RTF destination, you can use

ods rtf style=Journal;
proc sgplot data=Energy;
band x=Year lower=Previous upper=cumValue / group=Source;
...ETC...
run;
ods rtf close;

The advantage of using (or modifying) a style is that it applies to all graphs. If you only need to modify the attributes for a single graph, you can use the STYLEATTR statement to set the fill colors for one plot at a time. For the band plot, you can use the following:

proc sgplot data=Energy;
* STYLEATTRS datacolors=(white lightgray gray darkgray black);
STYLEATTRS datacolors=(CXF7F7F7 CXCCCCCC CX969696 CX636363 CX252525);
band x=Year lower=Previous upper=cumValue / group=Source;
...ETC...
run;

The PALETTE function in SAS/IML enables you to choose a set of greyscale colors that is optimal for distinguishing classes.