Can you spot the differences in the hangers? This reminded me of those puzzles that appears in newspapers/magazines with two similar pictures side by side from which you had to “spot the difference”. Since you have already spotted the odd one from the lot above, you would be glad to know that the green color was an indicator for a free hanger. These special hangers called the Hangindicators let you easily detect the free hangers from the large collection in your closet, just as you did now.
Designed by Adityaraj Dev, you can spot an unoccupied hanger that easily. Whenever a cloth is hanged on any one of this Hangindicator, the weight forces the neck of the hanger, which is attached to a spring to tug down, revealing the red color.
[source : tuvie.com]