>>4350578I don't think the .icc is your problem, fwiw I use a Nikon d7100, d80, d70 and I've never bothered to try any of that stuff. You shouldn't need an .icc for the camera as the camera's operating in the SRGB colour space is my understanding of it, i.e. the camera knows what it is and adjusts its output accordingly to match the SRGB spec (I may be wrong, I don't think I am.)
I suggest you just load it into darktable, turn the filters off so you get this type of config, then adjust the exposure and black point until you've filled the histogram, but don't push any of the colours up to the point that they max out (i.e. the far right and left of your histogram shouldn't be spiked up)