Sorry, but why would the graph of the voting intention have completely wrong colors for the parties (except CDU)? This was very confusing, as it looked like th

Sorry, but why would the graph of the voting intention have completely wrong colors for the parties (except CDU)? This was very confusing, as it looked like that AFD (normally blue) has the lowest voting intention meanwhile blue in the graph is "Left" which I think is the party "Die Linke" which is normally red.