Bright green

Sam pulled the bright green tube at the end of the rack out and put it into her hand with the duct tape. By this point, she just wanted to get this "contest" over with. It couldn't be anything too complicated or illicit, right? Compliance was her only choice.

An alarm sounded from the robot. "Ms. Topaz, you now have two minutes, thirty-three seconds before the competition begins. Do you have any further questions?

"It doesn't seem like you're willing to give me any of the information I really need," Sam said spitefully, "So I guess I'm ready to go."

"Well then, Ms. Topaz, good luck! And remember, have fun! Stay on your toes, use your head, and I'm sure you'll do just fine!"