To make this image, I placed a ring of small, blue Lobelia flowers from the garden on a light box. Next, I surrounded it with a ring of chamomile flowers, which have white petals and a slightly yellowish interior. In the center I placed a glass purple heart. The original version is shown second from the top, with the other variations created in Photoshop using LAB color channel adjustments.
If you’d like to learn how I use LAB color creatively for effects like these, check out my Advanced LAB Color Seminar on Saturday, November 12, 2016. Note that a free book give-away and an early-bird special discount both apply until July 31, 2016.