I hate admitting when I am wrong.
So what color is good?
500 different shades of grey.
a few shades of white.
Some greens.
Lighter shades tend to be preferred over darker shades.
Blues tend to cause more sleepiness, or inattention.
Reds tend to increase the number of fights between crewmembers.
So what color is good?
Okay, maybe there aren't 500 shades of grey.
But off the top of my head..
hull grey
equipment grey
machinery grey
deck grey
bilge grey
Nooo.
50 shades of grey. Kind of a dominatrix movie.
That's so grey.
There are at least 100 shades:
https://www.december.com/html/spec/color0.html
Really depends on your bit depth, though.
Mine is always reflex blue on grey 60# linen.
I once had a printer, in Hammond, run 500 flyers. He ran them w/o washing out the black from the prior run.
I told him to trash them and do it right. He did.
PMS specified colors that won't reproduce in a CMYK run is beyond the comprehension of most people.
Then when you tell them to get their "correct" logo color it will require an additional spot color and cost run they look at you like you have 2 heads.