I like the concept Stephanie, although I think it would have looked a lot more dramatic if it was only the rose and red drops in the frame.
Just a question... Are you trying to attempt selective colouring? Because if you are, there?s an easier way to achieve this effect.
Using Photoshop, click on 'Image' then 'Adjustments' and then 'Desaturate'. Then by using the history brush tool, draw the colour back into the image as if nothing was changed.
I have used the same effect on one of my images called 'Red Ferrari'. Check it out if you like.