Well... usually green dragon is indeed browner than greener... and its very dark too... so it isnt the problem.
What is the total amount of green dragon you got and what is the amount you did drink?

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"Everything we do, everything we are, rests on our personal power. If we have enough of it, one word uttered to us might be sufficient to change the course of our lives. But if we don't have enough personal power, the most magnificent piece of wisdom can be revealed to us and that revelation won't make a damn bit of difference." Don Juan Matus - Tales of Power