Last Month’s Riddle

Pronounced as one letter, and written with three, two letters there are, and two only in me. I’m double, I’m single, I’m black, blue, and gray, I’m read from both ends, and the same either way.

What am I?

Answer:
An Eye.

Thank you to all of you who submitted correct answers, but, unfortunately, we only picked one winner. We hope you try this month’s head scratcher!