I did a Watermelon White Merlot kit from Orchard Breeze - You are fermenting a white Merlot and adding a watermelon fpak - I was also curious of the color - how a white Merlot could be red - my kit finished a light red - I would not call it a blush - then after fpak it had more of a purple reddish tint.
A white merlot / White Zin / Rose will start out a bit dark like an amber ale beer. Once it has cleared and and you bottle it the thickness of the bottle ( ie 3" bottle vs 14" carboy) will let you see more of the Rose color, once in your glass it will look beautiful!