Hi PS_DiRtY, if a LED makes all those fancy shades it could be a defective LED, as those are RGB, so basically they should display every possible color you set. And if a LED is defective it won't display properly a color because it will mix it with other colors.
Another problem that could "led" to a mafunctioning LED is the power source which will not send the correct amount of energy and cause the LED to show a color "badly" mixed, resulting in those unwanted shades you showed in the photo.