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So I take a look at QE2 1993, see that there is an 1p. type, but again colour "crimson", and until now I cannot find the colour "dark maroon".
I would stop looking if I were you or you may find more colours to contend with.

That may sound confusing but it's true...and in the end you can make it more easy for yourself.
This is how it goes:
Royal Mail issue new Machins in a stated colour, their version of the colour.
For example, in 2007 they issued a Ruby-coloured £1 value to commemorate the 40th [Ruby] Anniversary of the Machin. Within days, Gibbons gave a new name to the colour of the stamp. I do not have a recent SG catalogue so if someone can chime in with the name...thanks. According to GB dealer Rushstamps, the colour for that £1 stamp is Magenta.
So even within the UK, a colour name cannot be agreed upon, not by dealers,catalogue makers or website owners.
And so Rik, you have an example to go with your Crimson or Dark Maroon or......
it's all the way one see's it, and in the terminology. If you look in a Scott Catalogue for the Machin colours you will become more confused......better not eh? !
What I find interesting is that Royal Mail can come up with a colour for THEIR products [and they issued colour blocks with the name on] and yet everyone else goes and changes it after their opinion.
Everyone has their own opinions as to colour. And so it is with stamps too.
You will get used to it, I promise, but stick to one list for colours it's better that way.
Londonbus1