Put leaders in pencil table

colour.tex

@@ -49,15 +49,16 @@
   \special{color push rgb #1 #2 #3}%
   #4\special{color pop}}%
 
+\def\dd{\cleaders\hbox{$\mkern1.5mu.\mkern1.5mu$}\hskip 2em plus 1fill}%
 \tabskip=0pt plus 1fill
 \halign to \hsize{%
-  #\tabskip=0pt\quad\hfil&%
+  #\tabskip=0pt\dd&%
   \hfil#\quad&%
-  #\quad\hfil&%
+  #\dd&%
   \hfil#\tabskip=0pt plus 1fill\cr
-\ct{1.00}{0.53}{0.37}{Staedtler red}          & 209 & \ct{0.37}{0.84}{0.00}{Koh-i-noor green}&76\cr
-\ct{1.00}{0.53}{0.00}{Stabilo red}            & 208 & \ct{0.37}{0.53}{0.84}{Stabilo blue}    & 68\cr
-\ct{0.53}{0.00}{1.00}{Herbin Violette Pensée} &  93 & &\cr
+\ct{1.00}{0.53}{0.37}{Staedtler red}            & 209 & \ct{0.37}{0.84}{0.00}{Koh-i-noor green}&76\cr
+\ct{1.00}{0.53}{0.00}{Stabilo red}              & 208 & \ct{0.37}{0.53}{0.84}{Stabilo blue}    & 68\cr
+\ct{0.53}{0.00}{1.00}{Herbin Violette Pens\'ee} &  93 & \omit\span\omit\cr
 }
 
 \bye