Re: automatic colour selection with good contrast

[Ben Laurie <ben algroup co uk>]

Rene' Seindal wrote:
> 
> Sunjay Bhatnagar wrote:
> >
> > Hi All,
> >
> > I need an algorithm which, given a background colour, can figure out
> > to some reasonable extend, a colour which should be used as the
> > foreground colour such that whatever is drawn using the foreground
> > colour is easily visible to the human eye (in terms of contrast etc.).
> >
> > Such algos. must be in use in many softwares and I would appreciate
> > any pointers/ideas towards this.
> 
> I am not an expert in this matter, but wouldn't the completary colour
> do, i.e., the colour (1.0-r, 1.0-g, 1.0-b) if your base colour is
> (r,g,b). It might not be pleasing, but it should give good visual
> contrast.

Errr ... no! Consider r=g=b=.5!

Cheers,

Ben.

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