Your goal is to find the secret four-color code. The following colors are possible: blue, green, purple, brown, red, yellow.
Some guesses have already been made. I will provide feedback for each guess made with which it is possible to unambigiously determine the secret code.

Previous Guesses:
Guess: ['green', 'red', 'purple', 'blue']. Hint: two colors are in the secret code but in the wrong positions.
Guess: ['blue', 'purple', 'brown', 'brown']. Hint: three colors are in the correct positions.
Guess: ['blue', 'blue', 'brown', 'purple']. Hint: one color is in the correct position and two colors are in the secret code but in the wrong position.
A B C D
blue, red, yellow, green blue, purple, yellow, brown blue, green, blue, blue purple, green, red, red