From the announcement:
The next new Colour Primer spray is Goblin Green.
The Goblin Green colour is well known and the Colour Primer spray is perfect for all your greenskins, scenery and wood elves. Also Imperial Guardsmen, Tau etc. will benefit from this very useful spray.
Colour Primer: Goblin Green is released in the USA on July 23rd 2012.
Colour Primer: Goblin Green is released in Europe on August 20th 2012.