General ⇒ color problems

[mro]

Hi there...

First, I tried to create a new command like this

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\newcommand{\chc}{\cellcolor{\lightgray}}

because I am lazy to always have to write

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.... & \cellcolor{lightgray} blabla & ...

inside a tabular cell that has to be colored, so I should now be able to write

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.... & \chc blabla & ...

That barked out on me with

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! Missing \endcsname inserted.
<to be read again>
                   \protect
l.790     $x_3^-$ & \chc $c_3$  &
                                  $0$         \\\hline
?
! Emergency stop.
<to be read again>
                   \protect
l.790     $x_3^-$ & \chc $c_3$  &
                                  $0$         \\\hline

So I tried

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.... & \cellcolor{lightgray} blabla & ...

again.

That now tells me

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! LaTeX Error: Undefined color `lightgray'.

(it worked before [TM])

Furthermore when I try to define new colors using \newcmykcolor it gives me a

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! Undefined control sequence.
l.12 \newcmykcolor

So, somehow, all of this is related, but I currently do not know how to fix it.
An idea, anyone?

Thanks,
Marki

[Stefan Kottwitz]

Hi Marki,

welcome to the board!
Did you define a macro \lightgray? Or did you define a color lightgray, without leading backslash?
You wrote \chc instead of \chcc.

\newcmykcolor is defined by pstricks (pstricks.sty) and texpower (tppstcol.sty), load the corresponding packag by \usepackage.

For more specific help regarding the errors please provide a minimal example showing the problems.

Stefan

[mro]

Did you define a macro \lightgray? Or did you define a color lightgray, without leading backslash?

Thanks
I had not included pstricks anymore since I switched to ps4pdf some time ago...
Additionally,
\cellcolor{\lightgray}
should obviously (now) correctly be
\cellcolor{lightgray}

Thanks again
Marki