I did a google search for the three paired with "Royal Navy" and for what it's worth found:
From "
The Secret Lives of Color By Kassia St Clair:
Hooker's Green: Bright green; Prussian blue mixed with gamboge; named after British Illustrator William Hooker (1779-1832)
Winsor & Newton actually has a Hooker's Green in their acrylic paint line and describes it thusly:
"Hooker's Green is a rich green colour with a yellow tint. A mixed pigment colour, it was originally created by 19th c English botanist illustrator William J Hooker. "
Yellow Ochre was a color used in the Royal Navy from
the sailing age, but the color could vary and I'm not sure of the appearance of the Yellow Ochre used at Normandy.
No hints as to stone yet, but I presume a medium gray of some sort.
_________________
Tracy White -
Researcher@Large"Let the evidence guide the research. Do not have a preconceived agenda which will only distort the result."
-
Barbara Tuchman