Puzzle 3: The Mysterious Case of the Missing Socks

You have 5 minutes to solve the puzzle, or you'll be stuck in an infinite loop of laundry day.

Here's your puzzle:

Imagine a world where the laws of physics are slightly off.

What color is the number 5?

Hint: Think outside the box.

Or maybe just think in a box, we won't judge.

Links:

Puzzle 4: The Sock Puppet

Puzzle 5: The Infinite Laundry