Apparently, it was part of an effort to achieve the vaunted color accuracy for the Amazon Kindle Fire HDX that saw Amazon make use of blue LEDs in order to light the display. Hence, the result of including that bit of hardware would be why there is an azure hue that makes its way around the display’s sides, especially on books and web sites. Apart from that, Amazon also claims that such lighting technique is good for your device’s battery, since it is touted to increase battery life by up to 20 percent. Will this particular tinge of blue turn you off from making a positive purchase decision?