I know the color you mean. I think one thing to keep in mind is that all those old 70s and 80s comics on newsprint fade incredibly; it may be that whatever mixes of shades they started out as, they've all faded to that dusty salmon base. (Think about the very early Batman scans we've seen here where Bats looks practically naked; whatever purple or grey wash they used faded to a skinlike grey-pink.) Not sure there's any real way to know if the salmon-pink was intentional or if another pigment leached out of it over time.