Sunflowers

I bought some striking red-orange sunflowers at the grocery store. I thought their color was unusual, but did not stop to consider how the flowers acquired this shading.

The flowers were in a green vase and all died except for one. I put the one sunflower in a clear vase. In the morning, I found the water had turned pink!

I then realized that the sunflowers must have been placed in red dye. When the flowers absorbed the red coloring, they turned orange.