The course needs one more flag exercise:
De kleuren van de vlag zijn rood, wit, groen en geel.
Is there a hidden meaning?
These are the colors of the Belgian flag. Or the German one, for that matter.
Some Germans might find it insulting, the yellow is actually Gold.
There is another sentence on here for the Dutch lessons that says, "The colors of the flag are red, white and blue." At which time there was a comment on that sentence that read (after translating), "No, they are black, red and yellow!"
En de kleuren van de vlag van mijn land zijn geel, blauw en rood :D