Okay, in order to get the hex value for a tile you need to do this:
Mouse over a tile, in the bottom part of the editor it will show the 2 numbers that correspond to that tile. For example (10,82) then you open up windows calculator, go into scientific mode, then in decimal mode put in this:
82*16+10
82 being the y value of the tile, then multiply that by 16, then you want to add the x value to that total. Then you will have 1322 if I'm not mistaken. Then all you have to do, is simply click the Hex bubble to switch to Hex mode (on the calculator) and you will get 52a.
You just add a 0x in front of it and your hex value is 0x52a

You can also just put in 82*16+10 in place of the hex value like:
mytiles = {0xaa,82*16+10,0xab};
That will work also
If you want, pick a tile out and I will give you an example as to how to get the hex (if you didn't understand what I said above)