System Requirements

Colour Oracle 1.3 requires macOS 10.9 or newer. Download Color Oracle here.

Important note for macOS 10.15 Catalina

If you only see the desktop image when running Color Oracle, you need to give Color Oracle the right to take a screen capture as follows:
  1. Open System Preferences.
  2. Select Security & Privacy.
  3. Click on Screen Recording in the list.
  4. Enable the checkmark for Color Oracle.

Simulating Color-blind Vision

Launch Color Oracle and select "Deuteranopia", "Protanopia", or "Tritanopia" from the menubar icon at the top-right of your screen to simulate deutan, protan or tritan color vision. Select “Grayscale” to see a luminance preserving grayscale version. Click with the mouse anywhere on the screen or press any key to return to normal vision.

Information Panel

To move the information panel, click on it and drag to another place. To resize the panel, click on the resize button at its bottom edge. Color Oracle remembers the size of the panel when it is started next time.
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Click the resize button once to shrink the information panel to medium size.
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Click the resize button twice to shrink the panel to its minimum size. Click it again to increase size.
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Start at Login

Select “Preferences” and then activate “Add Color Oracle to the menu bar at login" to add Color Oracle to your login items. When this button is selected, Color Oracle will be started automatically each time you login to your computer.

preferences

Keyboard Shortcuts

Pressing a function key on the keyboard can also simulate color-blind vision. The default settings are F5 for deuteranopia and F6 for grayscale. Select “Preferences” to change the keyboard shortcuts to other function keys. Make sure that assigned function keys do not conflict with other shortcuts. For example, F10 to F13 are usually reserved for Dashboard and Exposé. You may change these settings in the System Preferences.

Save Filtered Screen Image

Use this command to save the screen image with the currently selected type of color simulation to a TIFF file.

Quitting

Select “Quit Color Oracle” to terminate. There is no need to quit Color Oracle when not in use, as it is only using system resources when simulating color-blind vision.