Since you’re talking about hex you have to start with 0x and don’t forget the opacity.
So basically: 0xFFFF6666
ColorDrawable cd = new ColorDrawable(0xFFFF6666);
You can also create a new colors.xml file into /res and define the colors like:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="mycolor">#FF6666</color>
</resources>
and simply get the color defined in R.color.mycolor
getResources().getColor(R.color.mycolor)