teal.
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.
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.
Green
Blue green or green blue!!!!!!!!!its not rocket science!!!!!
Blue and green makes blue-green, obviously.
Your question answers itself. Blue and Green make Blue-Green.
To make the color Green, mix together Blue and Yellow.
Blue and green mixed make a teal or blue-green.
No. Blue and green make blue-green, which is a tertiary color.
Mixing green and blue creates the color cyan, which is a bright blue-green hue.