I just tested a batch of HQ's i got.
They were all double domed, double print, just like in your picture, and were varying in colour.
It appears that each pill has a red-peach coating, and that the colour underneath is more white than peach. If the coating has rubbed off, then the colour appears different.
I had a number of light and dark ones in my batch, and when I e1 tested both of them, they BOTH WENT STRAIGHT 2 BLACK.
The speed/k mix you are talking about is flat, not domed, and has HQ on one side only.
Hope that helps.
8)