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