Found this in an older post.
It is a shade of gray (not blue, green, or orange). Prior to 54, truck 235s might have been a darker gray-blue than the 1954 and later 235 truck's lighter-gray engine color.
Discussing the exact shade of gray is a lot like discussing different religions.
Here is an old GM engine color article by a VCCA members. However, people are not in complete agreement on who sells the correct gray for various years (Bill Hirsch, The Filling Station, Jim Carter, Classic Parts, etc).
Here is a 1954 235 painted Jim Carter gray (which seems to be a little darker than "Ford engine gray".
Good luck making a decision.
Hope that helps
John