From my personal photograph, I have transformed a Dahlia via HueForge! 

Try different colour combinations. 

INSTRUCTIONS: Print at 100% infill with a layer height of 0.08mm with a base layer of 0.16mm Swap Instructions:

• Start with Dark Colour
• At layer #7 (0.64mm) swap to Medium Shade
• At layer #15 (1.28mm) swap to Lighter Shade
• At layer #21 (1.76mm) swap to White for the rest.