I had some weed like that once. Same color. I called it midnight purple. The strain was Jack Black RosexGreen Crack. I'm actually smoking, right now, on my first harvest of a hybrid where I added OJ Krush to it. It's a mild smoke. High comes on slow, but hits hard. Gassy citrus flavor. I just uploaded a review video on it a few minutes ago. I couldn't get it to grow purple, though.