try to say the color, not the word as fast as you can... for example: although the first word says "yellow", you have to say "green", because thats what color it actually is... much harder than you think!
Look at the chart and say the COLOUR not the word
YELLOW BLUE ORANGE
PURPLE YELLOW RED
BLUE RED PURPLE
GREEN BLUE ORANGE
Left - Right Conflict
Your right brain tries to say the colour but
your left brain insists on reading the word.