The way the colors are blended reminds me of oil paintings. Especially with the white base color for the petals, it just brings me back to layering paint on a fan brush and then sweeping it up with a quick turn to make the petals. It looks really nice.
I'm actually not a huge fan of the muddy looking background color, I feel that it detracts from the flowers. The flowers, however, are gorgeous, and look like a delicately rendered painting. I also find Irises to be one of the prettiest flowers, along with spider lilies and peony, and narcissus... Lots of pretty flowers.