Isabelle, this is good!
I remember thinking when you posted the sticky bits on the cabin door handles, here's someone who has an eye for detail...
Your powers of observation and sense of the need to preserve the memory of QE2 is nothing short of fantastic!
The VADS description of the colour is definitely 'ochre' - rather than orange.
http://vads.ahds.ac.uk/diad/article.php?title=244&year=1969&article=d.244.39Ochre is a sort of 'natural' colour, (used by the earliest painters 'Egyptian, Italian etc') and not as harsh as orange
My guess is that the staircases of QE2 were designed to resemble a rich post-war sense of 'mod', safe and 'natural'.
Ochre goes better with teak!!
These are in complete contrast to the steps/stairs around the crew areas - does anyone have any images of these?