You can redistribute chart colors to emphasize specific charted items listed in the data layout and change chart focus. Colors are differentiated along a specific axis.
To change the pattern or color scheme of a chart:
Double-click a chart element in the legend, or select an element in the chart (such as a bar or a pie slice) and select Chart, then Properties.
A Properties dialog box is displayed that may contain one or more tabs (Patterns, Axis, Data Labels), depending on the format of the active chart.
Select the fill pattern and color for the chart segment, line, or marker and click OK.
Automatic—Sets the fill pattern and color to the default setting. The default setting for fill pattern is Solid. The default setting for color varies between chart formats.
None—Sets a transparent fill pattern and color for the selected element.
Custom—Enables you to select a foreground color and fill pattern for the chart. Choices include Solid, Hollow, Horizontal, Vertical, Cross, Diagonally Up, Diagonally Down, Diagonally Cross.
For line charts, you can also select the width, style and color of lines, and the size, style, border colors, and fill colors of markers.