Green
Unfortunately there is NO working cheat for it as of yet. All the listed cheats for that costume have proven to be utterly false. So, as of yet, the only way to actually get it is to complete all 180 Challenges.
Red Legged Honey Creepers like to eat nectar.
Blue and green are mixed to get the color blue-green. Different shades of blue-green can be achieved by adjusting the ratio of blue to green added during mixing.
i say green
Aaron Blue, Red, Yellow, Yellow, Yellow, Yellow, Yellow, Green. Air Instruments Red, Red, Blue, Yellow, Green, Green, Green, Yellow. Always Slide Green, Green, Red, Red, Yellow, Red, Yellow, Blue. AT&T Ballpark Yellow, Green, Red, Red, Green, Blue, Red, Yellow. Auto Kick Yellow, Green, Red, Blue, Blue, Blue, Blue, Red. Best Buy Kid (Nick) Green, Red, Blue, Green, Red, Blue, Blue, Green. Euro Contest Winner (Johnny Viper) Blue, Red, Blue, Blue, Yellow, Yellow, Yellow, Green. Flame Color Green, Red, Green, Blue, Red, Red, Yellow, Blue. Gem Color Blue, Red, Red, Green, Red, Green, Red, Yellow. Hyperspeed Green, Blue, Red, Yellow, Yellow, Red, Green, Green. Invisible Characters Green, Red, Yellow, Yellow, Yellow, Blue, Blue, Green. Line 6 Green, Red, Yellow, Blue, Red, Yellow, Blue, Green. Performance Mode Yellow, Yellow, Blue, Red, Blue, Green, Red, Red. Quickplay Blue, Blue, Red, Green, Green, Blue, Blue, Yellow. Rina Blue, Red, Green, Green, Yellow, Yellow, Yellow, Green. Star Color Red, Red, Yellow, Red, Blue, Red, Red, Blue. Vocal Fireball Red, Green, Green, Yellow, Blue, Green, Yellow, Green.
Blue green or green blue!!!!!!!!!its not rocket science!!!!!
Blue and green makes blue-green, obviously.
Green
To make the color Green, mix together Blue and Yellow.
Mixing blue and green together will result in the color blue-green.
There aren't "ancient creepers" in the application version of Minecraft, there are creepers.