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Issue with section text assuming same color as body text

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1

I am trying to understand a behavior where section headers assume the color of the first word in the section.

Here is my MWE:

documentclass{minimal}    

usepackage{xcolor}    

makeatletter

newcommandsection{@startsection{section}{1}{.25in}%

                                    {1.3ex @plus .5ex @minus .2ex}%

                                    {-.5em @plus -.1em}%

                  {reset@fontnormalsizebfseries}}

makeatother    

begin{document}

section{First}

{color{red} Hello there} More text

end{document}

The desired outcome is for "Hello there" to be red but the rest of the text (including "First") to be black. However, "First" is red. If a word is inserted before "{color" then the desired behavior occurs. What is going on here? The answer must be some basic fact about latex that I don't know.

Many thanks in advance.

sectioning color document-classes

share|improve this question

edited 20 hours ago

Bernard

172k776204

asked 20 hours ago

Zach BoydZach Boyd

1336

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Simply use textcolor{red}{Hello there}
  
  – Bernard
  20 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks--it works. Why does it behave this way?
  
  – Zach Boyd
  20 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No idea. Anyway, personally, I use the titlesec package for this sort of modifications to the defaults, and I don't think you'd have this sort of problem.
  
  – Bernard
  20 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I will check it out. Thanks
  
  – Zach Boyd
  20 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Without the negative vertical space the problem doesn't occur. (Just a debuging result to help you figuring out the problem... But I can't explain it... possibly this negative space says to latex to start coloring from the beginning of the line... If you knew a way to add the #1 argument of the section inside the command you could possibly solve the problem -that is the "why?"-)
  
  – koleygr
  20 hours ago
  
  
  

  
  
  
  

 | 
show 2 more comments

1

I am trying to understand a behavior where section headers assume the color of the first word in the section.

Here is my MWE:

documentclass{minimal}    

usepackage{xcolor}    

makeatletter

newcommandsection{@startsection{section}{1}{.25in}%

                                    {1.3ex @plus .5ex @minus .2ex}%

                                    {-.5em @plus -.1em}%

                  {reset@fontnormalsizebfseries}}

makeatother    

begin{document}

section{First}

{color{red} Hello there} More text

end{document}

The desired outcome is for "Hello there" to be red but the rest of the text (including "First") to be black. However, "First" is red. If a word is inserted before "{color" then the desired behavior occurs. What is going on here? The answer must be some basic fact about latex that I don't know.

Many thanks in advance.

sectioning color document-classes

share|improve this question

edited 20 hours ago

Bernard

172k776204

asked 20 hours ago

Zach BoydZach Boyd

1336

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Simply use textcolor{red}{Hello there}
  
  – Bernard
  20 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks--it works. Why does it behave this way?
  
  – Zach Boyd
  20 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No idea. Anyway, personally, I use the titlesec package for this sort of modifications to the defaults, and I don't think you'd have this sort of problem.
  
  – Bernard
  20 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I will check it out. Thanks
  
  – Zach Boyd
  20 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Without the negative vertical space the problem doesn't occur. (Just a debuging result to help you figuring out the problem... But I can't explain it... possibly this negative space says to latex to start coloring from the beginning of the line... If you knew a way to add the #1 argument of the section inside the command you could possibly solve the problem -that is the "why?"-)
  
  – koleygr
  20 hours ago
  
  
  

  
  
  
  

 | 
show 2 more comments

I am trying to understand a behavior where section headers assume the color of the first word in the section.

Here is my MWE:

documentclass{minimal}    

usepackage{xcolor}    

makeatletter

newcommandsection{@startsection{section}{1}{.25in}%

                                    {1.3ex @plus .5ex @minus .2ex}%

                                    {-.5em @plus -.1em}%

                  {reset@fontnormalsizebfseries}}

makeatother    

begin{document}

section{First}

{color{red} Hello there} More text

end{document}

The desired outcome is for "Hello there" to be red but the rest of the text (including "First") to be black. However, "First" is red. If a word is inserted before "{color" then the desired behavior occurs. What is going on here? The answer must be some basic fact about latex that I don't know.

Many thanks in advance.

sectioning color document-classes

share|improve this question

edited 20 hours ago

Bernard

172k776204

asked 20 hours ago

Zach BoydZach Boyd

1336

documentclass{minimal}    

usepackage{xcolor}    

makeatletter

newcommandsection{@startsection{section}{1}{.25in}%

                                    {1.3ex @plus .5ex @minus .2ex}%

                                    {-.5em @plus -.1em}%

                  {reset@fontnormalsizebfseries}}

makeatother    

begin{document}

section{First}

{color{red} Hello there} More text

end{document}

share|improve this question

edited 20 hours ago

Bernard

172k776204

asked 20 hours ago

Zach BoydZach Boyd

1336

share|improve this question

edited 20 hours ago

Bernard

172k776204

asked 20 hours ago

Zach BoydZach Boyd

1336

edited 20 hours ago

Bernard

172k776204

edited 20 hours ago

Bernard

172k776204

asked 20 hours ago

Zach BoydZach Boyd

1336

asked 20 hours ago

Zach BoydZach Boyd

1336

1 Answer
1

active

oldest

votes

0

First, let say that the issue have nothing to do with the definition of section. So the problem is not here, but in using color{red}...
instead of textcolor{red}{...}.

Here is a MWE that replicate the issue

documentclass{article}    

usepackage{color}    



begin{document}

paragraph{Foo}

{color{red}Bar} bla bla

end{document}

Why?

When the fifth argument of @startsection is negatif the heading is prepended to the paragraph of following text with the everypar command.
The command everypar is executed in horizontal mode i.e. when TeX see the character H in Hello, but at this moment is too late and the color change is already done. Here is another exemple

documentclass{article}    

usepackage{color}    



begin{document}

everypar{Foo everypar{}}

{color{red}ifvmodehrulevskip1cmfi Bar} bla bla

end{document}

The solution is to use textcolor{red}{...} or leavevmode{color{red}...}.

share|improve this answer

answered 1 hour ago

touhamitouhami

17.1k21245

add a comment | 

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0

First, let say that the issue have nothing to do with the definition of section. So the problem is not here, but in using color{red}...
instead of textcolor{red}{...}.

Here is a MWE that replicate the issue

documentclass{article}    

usepackage{color}    



begin{document}

paragraph{Foo}

{color{red}Bar} bla bla

end{document}

Why?

When the fifth argument of @startsection is negatif the heading is prepended to the paragraph of following text with the everypar command.
The command everypar is executed in horizontal mode i.e. when TeX see the character H in Hello, but at this moment is too late and the color change is already done. Here is another exemple

documentclass{article}    

usepackage{color}    



begin{document}

everypar{Foo everypar{}}

{color{red}ifvmodehrulevskip1cmfi Bar} bla bla

end{document}

The solution is to use textcolor{red}{...} or leavevmode{color{red}...}.

share|improve this answer

answered 1 hour ago

touhamitouhami

17.1k21245

add a comment | 

0

First, let say that the issue have nothing to do with the definition of section. So the problem is not here, but in using color{red}...
instead of textcolor{red}{...}.

Here is a MWE that replicate the issue

documentclass{article}    

usepackage{color}    



begin{document}

paragraph{Foo}

{color{red}Bar} bla bla

end{document}

Why?

When the fifth argument of @startsection is negatif the heading is prepended to the paragraph of following text with the everypar command.
The command everypar is executed in horizontal mode i.e. when TeX see the character H in Hello, but at this moment is too late and the color change is already done. Here is another exemple

documentclass{article}    

usepackage{color}    



begin{document}

everypar{Foo everypar{}}

{color{red}ifvmodehrulevskip1cmfi Bar} bla bla

end{document}

The solution is to use textcolor{red}{...} or leavevmode{color{red}...}.

share|improve this answer

answered 1 hour ago

touhamitouhami

17.1k21245

add a comment | 

First, let say that the issue have nothing to do with the definition of section. So the problem is not here, but in using color{red}...
instead of textcolor{red}{...}.

Here is a MWE that replicate the issue

documentclass{article}    

usepackage{color}    



begin{document}

paragraph{Foo}

{color{red}Bar} bla bla

end{document}

Why?

When the fifth argument of @startsection is negatif the heading is prepended to the paragraph of following text with the everypar command.
The command everypar is executed in horizontal mode i.e. when TeX see the character H in Hello, but at this moment is too late and the color change is already done. Here is another exemple

documentclass{article}    

usepackage{color}    



begin{document}

everypar{Foo everypar{}}

{color{red}ifvmodehrulevskip1cmfi Bar} bla bla

end{document}

The solution is to use textcolor{red}{...} or leavevmode{color{red}...}.

share|improve this answer

answered 1 hour ago

touhamitouhami

17.1k21245

documentclass{article}    

usepackage{color}    



begin{document}

paragraph{Foo}

{color{red}Bar} bla bla

end{document}

documentclass{article}    

usepackage{color}    



begin{document}

everypar{Foo everypar{}}

{color{red}ifvmodehrulevskip1cmfi Bar} bla bla

end{document}

share|improve this answer

answered 1 hour ago

touhamitouhami

17.1k21245

answered 1 hour ago

touhamitouhami

17.1k21245

answered 1 hour ago

touhamitouhami

17.1k21245