colors in environments

[Herbert Voss]

Am 06.08.24 um 17:06 schrieb Richard Kimberly Heck:
> On 8/6/24 8:56 AM, Sergio Celani wrote:
>>   Hello
>>
>> I need to modify or create a new module so that the environments 
>> 'theorem', 'lemma', 'proposition', etc., appear in a different color. 
>> For example, I'd like to modify the 'theorems-ams.module' file so 
>> that the colors of the environments change in the generated LaTeX 
>> file. I only want to change the color of the label and number, not 
>> the content. Is there an easy way to do this?

If you do not need the color inside LyX z´then you need
only these commands in the preamble (here only shown for Lemma):

\usepackage{xcolor}

\AtBeginDocument{%

\renewcommand\lemmaname{\textcolor{red}{\bfseries\Large Lemma}}%

\renewcommand\thethm{\textcolor{red}{\bfseries\Large\arabic{thm}}}%

}

If you want it also inside LyX, then create a new layout file
and set the color, e.g. for Lemma in theorems-ams.inc

Style Lemma
     CopyStyle             Theorem
     DependsOn             Theorem
     LatexName             lem
     LabelString           "Lemma \thetheorem"
     LabelFont
       color    red
     endFont
    ...


Attached the LyX view and pdf output for the amsarticle class.

Herbert
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