Well it falls witin the range of colours listed in the challenge outline so I can't fault you for that but I bet others will. Interesting composition but I think it would have been moreso if you had used a shallower DOF to emphasize the sign. Then again not everyone can do that in this type of situation - depends on your equipment to a certain degree I guess.
very, very nice composition! i love it, how the traffic signs suggests the circle and everything in the shot seem to follow the instructions of the sign! very very good composition... but I am not sure if this is for "Orange"... :( anyway, good job!