I don't think we can see the center, that circle looks like the base of the 3rd candle.
If you look at the green piece behind the left hand black bit, you can see the green is really one piece, a border print of some kind, there is more green activity at the right end of the "green" piece.
It's either a dif section of the same print as the 3rd fabric, or a co-ordinating fabric.
....imho... :mrgreen: