I have Mylands Sinner in eggshell on my staircase and linen cupboard. This is mostly lit from above by a skylight. In the daytime, the black is kind of lit from within by a mineral-y, steely grey tone. In the twilight, the grey sheen vanishes and the colour takes on a deep plum tone. The finish is lovely - very smooth and strokeable!.
However, trying it on the inside front door (dark hallway) was useless. The eggshell didn't reflect any light, the dark colour overwhelmed the stained glass, and it didn't matter that matching the door to the staircase looked wonderful in any number of photographs, it just didn't work in my hall. So I used gloss finish, French Green - reflects the light around and the green has enough yellow in it to pick up the yellow, amber and green in the glass. Again, the finish is very satisfying to touch.
I've only, so far, used the Mylands matt emulsions as testers, but they go on beautifully, with good coverage. But can't comment on the final effect on a whole wall.
But two things stand out: first, you need to get the prep right, because the most expensive paint won't deliver on shoddily prepared surfaces.
And secondly, even the flattest, whitest, most basic emulsion will 'change tones in the light' because, er, the world is not flat and shadows and different lighting conditions will change how colours appear.
I find the whole business of choosing colour quite tricky, and am slowly moving out of a dull and safe comfort zone to add colour. I enjoy these threads a lot.