Yep definitely in ketosis! As Sasha said try to keep the water up as being very dark isn't so good for you.....
Also don't get too obsessed with it, I found myself checkin about 8 times a day when I first started CD.
It's only an indicator of fat burning..... the colour doesn't really affect how much weight you actually lose on the scales every week.
Well done for getting into ketosis, the fat is now being burnt off by your body as you read this!!!