The extraction looked wonderful/perfect at first.
I started to worry from C, however.
Problem in the judgment is, there is no reference as to white balance and contrast.
Can I suggest the introduction in the picture of either a neutral density (18%) gray card, or better a stepped gray card, stepping from white to gray. The machine's chrome, and environmental reflections in it, might fool the eye.
Depending on the reflective properties of the differently colored substances in the pour, even changes in the light-subject-camera angles may make a difference to our perception of both color and contrast.
My proposed reference would subconsciously inform the viewer about their own computer/monitor/environment setup as well.