When it comes to using colors in charts, try to keep it simple. A good rule of thumb is the 60-30-10 principle: use a primary color that dominates 60% of your project area, a secondary color that takes up 30% of the project to visualize important data, and a third, accent color that draws particular attention to 10% of your data.
To change the colors used in your chart:
❶ Click to select your chart, then expand the Color drop-down in the right sidebar.
❷ Disable the Use one color option to choose a color for each variable. Click on color boxes to choose the color by using the color picker or entering a hex code.
To change colors used in chart's legend and axis, expand the Fonts tab in the right sidebar.
In charts containing multiple tabs, you can adjust individual tab colors:
❶ Click to select your chart, then expand the Settings: Global menu at the top of the right sidebar.
❷ Select a tab.
❸ Expand the Color dropdown and adjust the color. This will only change the colors for the data in the selected tab.
If you want to reset individual sheet colors and return to global settings, click the link at the bottom of the right sidebar when in individual (sheet) color mode: