fix the mis-typed function name `blue` in example code
fix the mis-typed function name `blue` in example code

a-x-/stylus,meteor/stylus,tyv/stylus,trixter5/stylus,behzad88/stylus,baotingfang/stylus,johnnycopperstone/stylus,jangarcia/stylus,SimenB/stylus,modulexcite/stylus,Zagorakiss/stylus,galenvagen/stylus,angryrobot/stylus,silvaemota/stylus,Ricardh522/stylus,peterkinalex/stylus-1,rstacruz/stylus,Delapouite/stylus,yetone/stylus,jonpacker/stylus,cemoulto/stylus,ThiagoGarciaAlves/stylus,jameswomack/stylus,HossainKhademian/Stylus,stylus/stylus,PeterWangPo/stylus