Try using the hex color, include an alpha value and set the defaults to 0: 

notification.defaults = 0;
notification.ledARGB = 0xff0000ff;


Also, the notification interface says this:

public int ledARGB
Since: API Level 1

The color of the led. The hardware will do its best approximation.


I'm assuming your hardware has all the colors, but it may not.

Changing LED color for notifications
When having a long rest, you regain all your hit points and half your spent Hit Dice (for use in future short rests). I know that normally when faced with fractions you round down. But then, I see no way to regain your 1 Hit Die at 1st level.

So basic question: if you are at first level, and you take a long rest, do you regain your Hit Die, or do you not because you had to halve 1 and round down?
