Go to Edit > Keyboard Shortcuts. In Product Area: Window Menu, check out the keyboard shortcut for Color: Color. If necessary delete a faulty keyboard shortcut.
If that doesn't work, try restoring your InDesign Preferences. Here's how:
Go to Edit > Keyboard Shortcuts. In Product Area: Window Menu, check out the keyboard shortcut for Color: Color. If necessary delete a faulty keyboard shortcut.
If that doesn't work, try restoring your InDesign Preferences. Here's how: