The text color options have been all over the board.  First, they were what I considered "just right".  Then apparently someone complained, because they made them what I'd call "vivid", as in TONS of color.  Recently I guess other other people complained, and so, now they're so washed-out they may as well just call them different hues of "off-white".

So obviously they can't please everyone, right?  Wrong.  A simple selector in settings, where a user could choose between three styles, "Vivid", "Default", and "Pastel" perhaps.  Maybe named better, but the point is the user could choose.  And because different computers render differently, users could choose them "on the fly" because the actual colors won't change, just the color saturation!  (If that's the right term.)  So there should be minimal programming required, and very little data - just a display setting.

And that's how you keep all your customers happy!  :-)

PS.  I use the dark scheme.  But I think the same principle would work in light.  Experimentation required.

PPS.  Also for Line Colors in quote blocks.  Possibly also for highlights and/or backgrounds.