Try to speak up the colour name instead of the word.
You would struggle a little to do this task. Because contradictory information is provided, our brains take some time for decision-making.
This forces you to put more neurons to work, since the information is not aligned with what you know. This is called Stroop Effect.
Looks like the designers at Mini are running this experiment at a global level with their turn signal!
I came across this article Congratulations, Mini, You Made The Stupidest Turn Signals Ever. This is why we need to mix psychology with design.