A theme is a combination of preset background and default colors, fonts, icons, and other design elements.
To change your project's theme:
❶ Deselect any objects in your project or click outside of the canvas.
❷ Open the Settings tab on the right, then click the thumbnail to toggle to a different theme. This will change the chart and text field colors, font type, and in most cases the background color. On the list, you will find a colorblind-friendly theme, which features a color palette that allows you to create accessible content. For more on accessibility, read about creating accessible content.
❸ To customize the background color, click the colored square below the theme selector under Project background.