Which you should find as “Eau-de-Nil” in the Colourcoats range. When I was a kid in the 50s/60s a glossy variant used to be available from Humbrol with a very low number, but has long gone. The colour was widely used for interior decoration at the time (and previously). I gather it was also used for the interior of various military vehicles, such as signal bodies, as it was considered a restful colour for the eyes.