Hyperlink Colours

Does anyone have any pointers to advice or research on what colours to use for hyperlinks and why?

I know Nielson Norman says we should stick to the default colours but what do other people say?

Pete

Peter Rainger ( p.f.rainger@sussex.ac.uk )
TechDis, USIE, EDB, 
University of Sussex,
Brighton BN1 9RG
Tel: 01273 873600
http://www.techdis.ac.uk