I thought about how I might do this and decided the only way to accomplish it would be to stamp on Whisper White and do a LOT of coloring with SU! Stampin' Write Markers. I took my Time Well Spent set, since it was the one with multiple flowers that mimicked the style in the picture. I stamped them all with Versamark and heat embossed them with White Embossing Powder. Then I set about the task of coloring the 3.25" x 3.5" piece. It took me over an hour of meticulous coloring, switching between my fine tip and the brush tip, to complete this small square!
For the record, I used Pink Passion and Rose Red, Pumpkin Pie, Green Galore, and Taken with Teal, besides the obvious Chocolate Chip.