White LED light sources should not have a blue hue unless it is purposely designed in such a way. Some LED systems, for example parking lot lights, are designed to have a blue hue mainly because modern security cameras are more sensitive to bluish white (cooler white).
However, a bluish hue is usually a sign of an improperly designed system. If you exceed the maximum power an LED can handle, or if the LED thermal management is designed improperly, an LED light will slowly turn to the blue spectrum. A good example is found in many LED based flashlights. LEDs within flashlights are overdriven on purpose and thermal management is usually very basic in order to make them more affordable. Overdriving will increase intensity but lifespan goes down to under 3,000 hours. Even so, 3,000 hours is still 30 times more than an incandescent counterpart.