# UpdateGuidelineDesignSettingsBackgroundColorDataInput > Input in domain **Guidelines** - HTML: [UpdateGuidelineDesignSettingsBackgroundColorDataInput.html](UpdateGuidelineDesignSettingsBackgroundColorDataInput.html) - Raw SDL: [UpdateGuidelineDesignSettingsBackgroundColorDataInput.sdl](UpdateGuidelineDesignSettingsBackgroundColorDataInput.sdl) - Covered by: [llms.txt](../llms.txt) ## Input fields - `backgroundColor`: `String` _(beta)_ — The background color in rgb/rgba format, e.g.: "rgb(255,255,255)" or "rgba(255,255,255,0.5)" or null