The color of your cars VT inspection sticker is for a quick check at a distance as to what year it will be due. Right now stickers are green or red. Red expires 2015, green in 2016. Colors change every year to a color that is easy to tell the difference from the previous year. It might go from red to green, then yellow, then blue and back to red again. The number indicates which month the sticker will expire. In Vermont we use only even numbers, and expiration is at midnight of last day of that month. If number 8 is on the sticker, the vehicle could have been inspected from July 1st up to August 31st. Right now every red sticker with an 8 is due and if vehicle passes inspection it will get a green one with an 8. Now with a quick look you can tell when a VT inspection is due.