This has the potential to be extremely useful:
http://colors.silicon-dragons.com/You can either search for a colour by existing paint, or by Hex code.
For example, if I want a replacement for GW Warlock Purple in the Vallejo Game line, I select 'Paint Search' and find 'GW Citadel Colour' and click 'submit'.
I can then select 'Warlock Purple' from the list, and pick 'water based acrylics', 'flat' and 'Vallejo Game Colour'. Another 'submit' click and I get 'Warlord Purple'. If you dont select the settings at the bottom, it finds the closest matches from any range.
You can also find the Hex code of a paint colour in a web picture using your favourite paint package, and type that in to find the closest paint available that matches.
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