This is a my favorite tulip shot so far. I wish the yellow could be more prominent somehow to truly complement the puprple instead of being in the background
The halos surrounding the foliage against the blue background are distracting and gives the picture an unnatural look. Perhaps a different angle to get the purple and yellow flowers a greater percentage of the frame, reducing the blue background?
4 - Nice shot and angle of the tulips. Perhaps an even more 'front on' angle, using the yellow ones 'more', and diminishing the blue (and green) as much as possible for this Challenge, make this better in my opinion. Nice shot as is, but for the Challenge there's too much blue - in my opinion.