spell check highlight colors

[Ema]

Is it possible to change the color of the highlighting used in the
spell/grammar check? I am not referring to the red underlining, but to the
highlighting that is used when one uses the Review -- ABC Spelling & Grammar
option to check a document after it is written. Currently, I get a dark blue
(gray if gray color option is used, or another dark color if black is used
for the default color for Word's background). The highlight is too dark --
it makes it difficult to clearly see the letters on a one-to-one basis, which
is what you need to do in spell correction.