Your display adapter may only be capable of rendering 256 colors, or, more likely, your display's control panel is set to 256 colors. If that is the case, set your display's control panel to thousands/millions of colors or high color/16 bit. Select "Display" or right-click on the desktop and choose "Properties" to correct the problem. You'll need to quit and re-launch your browser to reset the colors. If your video hardware is not capable of displaying more than 256 colors at your chosen resolution, the video will still work, but it may be oddly colored and/or look slightly fragmented.
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