Tell me what this is...

United States
October 27, 2006 3:48pm CST
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?
1 person likes this
2 responses
alainnmiog
@alainnmiog (660)
• United States
27 Oct 06
Oh! Just a little too late!
1 person likes this
tamra2
@tamra2 (259)
• United States
27 Oct 06
eye
2 people like this
alainnmiog
@alainnmiog (660)
• United States
27 Oct 06
Y'all are just too smart! Congratulatins!
1 person likes this