Using pull-down menus or the command line, you can set the colors for the entire Worksheet or for an activated Window's background color, series color, and grid color.
To set the colors for the entire Worksheet:
Select Tools > Options > Settings & Colors > Global Colors
Choose the desired set of colors and click OK.
To set the colors for an individual Window:
Select View > Colors > Window
Choose the desired set of colors and click OK.
To set the colors for an individual series:
Select View > Properties > Graphical Settings
Choose the desired set of colors and click OK.