I want to define a colorgroup of gray values, so I tried the following: \definecolorgroup[test][gray] [.1:.1:.1, .2:.2:.2] The result was: ---------------------------------------- ConTeXt ver: 2003.4.29 fmt: 2003.5.8 int: english mes: english ... ! Undefined control sequence. <argument> \v!gray \p!compareprocessaction ...edaction \!!stringb {#1 }\ifx \!!stringa \!!string... \next1 #1,->\p!doprocessaction {#1} \doprocesscommaitem <argument> ...gray =>\edef \currentcolorspace {S}, \v!spot =>\edef \currentc... \processnextcommalist ...dodoprocesscommaitem #4#5 ,]\relax \global \advance ... \dodefinecolorgroup ...def \currentcolorspace {R}] \colorcount \zerocount \de... ---------------------------------------- Maybe there is a shorter way to define the gray values, so I tried \definecolorgroup[test][gray] [.1, .2] No luck. When I use rgb tables, all works fine. Has anyone an answer for that? Regards, Peter