--- title: "Incorrect page color in night mode rendering" canonical_url: "https://www.nutrient.io/guides/ios/knowledge-base/how-do-i-reset-custom-document-render-options-before-change-the-appearance-mode/" md_url: "https://www.nutrient.io/guides/ios/knowledge-base/how-do-i-reset-custom-document-render-options-before-change-the-appearance-mode.md" last_updated: "2026-05-14T16:53:43.872Z" description: "Learn how to reset document render options for the night appearance mode to fix incorrect page colors in your iOS application." --- # Fix incorrect page color in night appearance mode If you’re customizing [`backgroundFill`](https://www.nutrient.io/api/ios/documentation/pspdfkit/renderoptions/backgroundfill) in [`-[PSPDFDocument updateRenderOptionsForType:withBlock:]`][-updaterenderoptionsfortype:withblock:], and then you switch to [`PSPDFAppearanceModeNight`](https://www.nutrient.io/api/ios/documentation/pspdfkitui/pdfappearancemode/night), the page color display is incorrect. | Expected | Actual | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | | ```swift let document: PDFDocument =... document.updateRenderOptions(for:.page) { options in options.backgroundFill =.red } ``` This behavior is expected because, if you already have custom document rendering options and you change the current appearance mode, then the new appearance mode’s rendering transformation will be performed on top of the current document’s rendering. To avoid this, you’ll need to reset your custom rendering options before changing the appearance mode. You can do this in `-[PSPDFAppearanceModeManagerDelegate appearanceManager:applyAppearanceSettingsForMode:]`. In Swift, the implementation would look like this: ```swift func appearanceManager(_ manager: PDFAppearanceModeManager, applyAppearanceSettingsFor mode: PDFAppearanceMode) { // Reset custom render options only for sepia and night appearance modes. document.updateRenderOptions(for:.page) { options in var backgroundFillColor: UIColor switch mode { case.sepia,.night: // Set the default value. backgroundFillColor =.white default: backgroundFillColor =.red } options.backgroundFill = backgroundFillColor } } ``` --- ## Related pages - [Adjusting Size Of Popovers](/guides/ios/knowledge-base/adjusting-size-of-popovers.md) - [Fix app store connect operation errors in Xcode](/guides/ios/knowledge-base/app-store-connect-operation-errors.md) - [Archive Errors Cocoapods](/guides/ios/knowledge-base/archive-errors-cocoapods.md) - [Customize your iOS navigation bar above crop UI](/guides/ios/knowledge-base/customize-the-navigation-bar-in-crop.md) - [Adding Swipe Gesture Recognizer](/guides/ios/knowledge-base/adding-swipe-gesture-recognizer.md) - 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