How to Enable High Contrast in PDF Viewers

High contrast mode is an accessibility feature designed to improve readability for individuals with visual impairments or color blindness. In PDFs, high contrast mode adjusts the colors of text, background, and other elements to ensure sufficient contrast, making content easier to read. Users can enable high contrast through their operating system, PDF viewer or both.

Adobe Acrobat Reader DC

Adobe Acrobat Reader supports high contrast settings directly.

Steps to Enable High Contrast in Adobe Acrobat Reader:

Open Adobe Acrobat Reader.

  1. Go to Edit > Preferences (Windows) or Acrobat Reader > Preferences (Mac).
  2. Select Accessibility from the list on the left.
  3. Under Document Colors Options, check Replace Document Colors.
  4. Choose from the predefined high contrast color combinations:

    • Black text on a white background.
    • White text on a black background.
    • Yellow text on a black background.
    • Custom color options (set your preferred text and background colors).

  5. Click OK to apply the changes.

Browser-Based PDF Viewers

If you're viewing PDFs in browsers (like Chrome, Edge, or Firefox), enable high contrast mode in your operating system.

  • Windows

    1. Open Settings > Ease of Access > High Contrast.
    2. Toggle Turn on high contrast and choose a color theme.

  • macOS

    1. Open System Preferences > Accessibility > Display.
    2. Enable Increase Contrast or Invert Colors.

High contrast settings in your OS will apply to the browser-based PDF viewer.

Other PDF Viewers

Many alternative PDF readers also support high contrast modes. Check the Preferences or Accessibility settings to find similar options.