Am 29.01.2013 um 09:11 schrieb Devendra Ghate <devendra.gh...@gmail.com>:
> I have been going through the concepts underlying pallet. > > I would like to define three basic colors in RGB. Then use various shades > and tints of these basic three colors through out the document. > > Now the algorithm for getting various shades for RGB scheme is: > > Darker shades: > Multiply each component by 1/4, 1/2, 3/4, etc. > of its previous value, depending on how dark the > color should be. > > Lighter tints: > Calculate (1 - previous value), multiply that by > 1/4, 1/2, 3/4, etc. and add that to the previous value. > > What I would like is a macro that is fed a color name > and should define 3 shades above and below it. \definecolor[test-0][r=0.8,g=0.2,b=0.4] \definecolor[test-1][1.00(test-0)] \definecolor[test-2][0.75(test-0)] \definecolor[test-3][0.50(test-0)] \definecolor[test-4][0.25(test-0)] \starttext \startlines \color[test-1]{1.00} \color[test-2]{0.75} \color[test-3]{0.50} \color[test-4]{0.25} \stoplines \stoptext Wolfgang ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________