Your goal is to find the secret four-color code. The following colors are possible: blue, green, yellow, purple, black, white.
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: ['black', 'yellow', 'green', 'blue']. Hint: two colors are in the correct positions.
Guess: ['blue', 'blue', 'green', 'green']. Hint: one color is in the correct position.
Guess: ['yellow', 'purple', 'white', 'purple']. Hint: one color is in the correct position and two colors are in the secret code but in the wrong position.
Guess: ['purple', 'yellow', 'green', 'purple']. Hint: three colors are in the correct positions.
A B C D
white, yellow, green, purple purple, black, yellow, yellow green, yellow, yellow, black black, purple, yellow, green