TuesdayOrange- colorchallenge

Hey. Hope you all are fine. I was just scrolling my feed and I saw something called #colorchallenge, and the color of the day was orange. By the grace of God, I had recently taken a picture of somewhat 'orange' flower. So I thought of posting it. And here it is....
IMG_20170606_141205.JPG

What is this #colorchallenge, some help will be very much appreciated.

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