MWE: \definelabel[xx][headcolor=red] \starttext ab\xx \stoptext
fails, reporting in log: tex error > tex error on line 4 in file G:/Desktop/mwe.tex: ! Undefined control sequence <argument> \c!symbolcolor \labelparameter #1->\csname \ifcsname \??labels \currentlabel :#1 \endcsname \??labels \currentlabel :#1\else \expandafter \dolabelparentparameter \csname \??labels \currentlabel :\s!parent \endcsname {#1}\fi \endcsname \useconstructionstyleandcolor ...pty \else \dousecurrentstyleparameter \fi \edef \currentcolorparameter {\labelparameter {#2} MkIV only, no problem in LMTX. -- Rik
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