What's with this ral paint chart

[steveo3002]

Rustileum RAL chart here, see the other coulered square slightly above the colour? What's that about?

 

[Welderpaul]

Is it the primer/undercoat colour you should use with each shade?

 

[steveo3002]

Is it the primer/undercoat colour you should use with each shade?

cant see it myself

did wonder if it was a hint whats in in...i.e its blue /grey or a green /grey but not that sure

 

[Agroshield]

The Rustoleum range seems to be available in gloss and satin:

Rustoleum RAL Colours Colour Card

Rustoleum RAL Colours colour card available at Brewers

www.brewers.co.uk

Maybe the two options are trying to show the two finishes (but some of them - 8001 8023 - are extremely different).