[NTG-context] Re: transparent color

On 6 May 2024, at 09:41, Hans van der Meer via ntg-context wrote:

I would like to use a transparent version of an existing color. Thus \definecolor[transparentcolor][color,t=0.2,a=1] instead of \definecolor[transparentcolor][r=..,g=..,b=..,t=0.2,a=1] because I do not know the rgb values of the color that must be made transparent, only its name.

How to accomplish?

The Wiki page https://wiki.contextgarden.net/Color gives the source files for various sets of colours (built in, crayola etc) and the source has the RGB values in a fairly obvious format. — Bruce Horrocks Hampshire, UK