I was recently faced with this strange problem. The wifi led started to blink (blue and orange) even after a wireless connection was made. After searching and finding i got the solution for this.
1. Open a terminal and type the following:
sudo gedit /etc/modprobe.d/wlan.conf
2. Add the following line to the end of the file.
options iwlcore led_mode=1
3. Restart the machine and the led should not be blinking now.