Rnd 1: with first color, dc 12 in magic circle. Finish off.
Rnd 2: with next color, sc, ch 1 around. Finish off.
Rnd 3: with third color, sc, ch 2 around. Finish off.
Embroider crochet into first round with yet another color of your choice.
Rnd 4: Join petal color in any ch-2 sp. Ch 3, then crochet 4 dc in same to make first shell. *Sc in next sp. 5dc in next ch-2 sp. Repeat from * around. Sc in final ch 2 sp. Join with sl st to first ch 3. Finish off.
Embroider crochet in rnd 4 to create petal-shaped outline.
Here is a video of how to embroider or surface crochet:
Please add corrections or suggestions in the comment section, thank you!