RLM 70 and 71 look pretty close, but I can see difference clearly.
On a monitor differences can look smaller then with real paint. For dark colours the gamma settings of your computer.
But also due to the limitation of digital values colours can look a bit off.
In very rare occasions it happens that two slightly different colours have the same RGB values.
But you did find a mistake in RLM 74 allright. the RGB values do not match the HEX value. But I do not think it was confused with RLM 70 or 71. Both are much darker.
I don't have my books and RAL software available right now. But give the name (Grey, Greenish), I tend to believe that the RGB values are correct and the HEX values is wrong. I just made a mistake with compiling the list.
When I'm home I'll check the colour with the swatches I have and look up the right RGB and HEX values to correct the list.
And since the comparisation with RAL comes from old German sources and the RGB values are calculated using software from RAL itself.
So, the values you get tonight will be correct. The swatches used are based on the latest research which is also used for painting German aircraft for museums for example.
Just remember that RGB values are sightly different for various monitors and printers. Since these lists are meant for skinning, we use settings for an average 'standard' monitor.
Now a little word about differences between sources:
For scale modelling (and thus colours for skinning) almost every colour is translated to the common known American FS595 list.
But... this is an American system from 1970 it contains some 600 colours which are divided in gloss, silk and matt. In all some 250 colurs are left!!!
Easy to understand that not every colour from every country can match exactly. Some are even way off.
This is exactly the case for RLM colours. For some RLM colours you can find 3 or more FS numbers as 'closest' match.
That is the reason why we have chosen to try and find the closest source to translate colours. for RLM that is RAL. another German coloursystem from 1927, which is in use still today. There are German handbooks which list which RAL colours match with RAL colours (some 50% of them, you can find those in the RLM list) and RAL has software to calculate the RGB values for their colours. So, that is where our RLM colours come from. The others are based on the colours as found with the latest research done by professionals in this matter. BTW: those professionals also use the RAL comparisation where possible, since that is the best documented source there is.
At the moment we are working to improve other lists as well.
For British Standard we have original data, so no longer a comparisation with FS595 and the Russian list is also compiled using original data.
So, where possible we use the closest possible source, in all other cases we follow the common translation through the FS595 list.
Anyway, have some 8 hours patience and you'll have the corrected colours.