>> Are there any objections to changing context fg/bg to the default fg/bg
>
> Yes; that is a bad change. I went into detail in a previous message;
> did you not read it?
Then I don't understand why changing yellow context foreground to the
default black foreground is a bad change if everyone complained that
yellow-on-white color combination is not readable. Do you have
a better suggestion for the foreground color of context lines,
other than current yellow and proposed black? [Note that the
color in question is for context lines, not for changed lines.]