The HTC M7 is expected to become available on March 8th in both black and white. Take into account that this is only a rumor, but still one that makes a lot of sense for HTC as an early launch of the M7 will give it two or three months of leeway over the Samsung Galaxy S IV.
Earlier estimates mentioned HTC was trying to manufacture 4 to 5 million units of the M7 in Q1 2013.
As to the colors, we've only seen leaks of a black HTC M7, but the Taiwanese phone maker is expected to also bring a silvery white model.
Lastly, while a March 8th HTC M7 launch date sounds great, this might be the time when the device arrives to Europe, and it might take a while longer until it makes it to U.S. carriers because of longer testing periods.