You can gray out the blue in the background a little bit. Blur out the background and put all of the concentration of color and contrast in the vase. Also slightly warm up the blue in the vase compared to the background blue. You don't have to follow the photo exactly.
One great tip: If you put the photo on your computer and use the pick color tool, you can "see" better what color is actually there. It's not just the blue that's getting you here, it's the white/cream color.
You've got a great start! Keep painting!