This is an unhappy metaphor. It makes us think of uncertainty and impurity. "Well, that's kind of a gray area." A murky twilight where our vision is not clear. A white shirt that has gotten dingy.
I prefer rather to think of a spectrum of colors, ranging from red, past orange, along through yellow to green, stopping for a while in the sky blue before moving on to navy blue and violet that gets deep and dark, until it's indistinguishable from black.
The uncertainty disappears. We can vividly see where we are between the extremes. Our various perspectives may bring us to disagree about the exact shade of yellow. "Is it a pale daffodil yellow or an almost orange marigold?" We are not sure. But we happy in our knowledge that it is not red or blue. And it is not dirty. It is bright and clean and yellow.