As of now, I've narrowed my options down to gray or hazel.

One could easily argue blue (as seen in the photo below I found in the character resource archives of the site), though I leaned toward gray because it's an offshoot of blue and has a tendency to appear blue under certain lighting conditions.



Some gray:

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https://alienfilmspedia.fandom.com/wiki/William_Gorman says Brown.
The IMDB picture suggest a greyish brown IMHO.

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Sgt. Frank Peters 'reload' Smartgun Operator
A03/TQ3.0.12136E1 "It will be no picknick!"
AL Colonial Admin. - Sergeant at Arms (SgtA) -- 2020-2022
GERCM - Executive Officer (XO)
UKCM Foreign Legion: The Deviant Dragoons

Id bet that information will surface through production materials/documents at some point. They had Jannette wear those uncomfortable hard contacts, so we know the attention to detail went so far as to involve eye color. On his IMDB page they look hazel or green in multiple photos. For what its worth. Maybe also consider how difficult it has been for people to narrow down armor paint colors as well as how brown bess paint appears to be OD green on film.

https://www.imdb.com/name/nm0394054/med ... 1753527040