Dell Alienware M11x R3 (Early 2011) - Manual (Page 35)

CHAPTER 2: GETTING TO KNOW YOUR LAPTOP
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On AC adapter:
Blue or custom AC‑color The battery is fully charged.
Blue or custom AC‑color fading into
white or custom battery‑color The computer is turned off or on and
the battery is charging.
Blue or custom AC‑color fading into
black The computer is in standby mode.
On battery:
Amber or custom battery‑color The battery is fully charged.
Amber or custom battery‑color fading
into black The computer is in standby mode.
Blinking Amber or custom battery‑
color The battery charge is low.
For more details on standby and hibernate mode, see Power Options in the control panel of
your Microsoft Windows operating system.