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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.help
Subject: Re: Use variable in setcustom
Date: Thu, 14 Nov 2019 11:24:54 +0200
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In-reply-to: <20191110023036.r2gsq6znmykbol7q@Ergus> (message from Ergus on
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> Date: Sun, 10 Nov 2019 03:30:36 +0100
> From: Ergus <spacibba@aol.com>
> 
> Do we have some method to define colours or paletes?
> 
> So that I could use a similar approach like?
> 
> ```
> (set-face-foreground 'font-lock-preprocessor-face "mycolor")
> ```

Color names are passed to the underlying GUI system, so you cannot
easily invent your own.