very well shot and good idea and thought behind this, i perhaps would have like to have had the hand in b&W too and maybe a little colour on some of the petals on the flower being coloured, just a preference..
when I look at this image, I see that hand takes about 40% of the space and it seems like a bit blurry to me though nice concept and have caught my eyes.
I did a similar thing about 18 months ago and was disqualified. Reason, I made a new shape by not finishing colouring in a petal. Hope you do better than me. Nice idea