So, to come up with chromatic grays, I had to mix the compliment of each of the colors together. The result should lead to what the color is, but a little bit darker and leaning towards the color or grey value. For instance, according to the color wheel, the compliment for red, is green, when you mix them together, you get a grey, but for example, if my goal was to make it look like a chromatic red, then i would add a little bit more red than green and visa versa. Now of course because nothing is ever simple, I had to mix my own greens, violets, and oranges. But it worked out after 7 hours, and this was my result for my broad and narrow key value.