How to change the color of an equation?

Question

\documentclass[10pt,landscape,a4paper,svgnames,x11names]{article}

\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\usepackage[utopia,sfscaled]{mathdesign}
\usepackage{amsmath}

\everymath{\color{MidnightBlue}}

\begin{document} 
\section*{Reihen} 
\begin{equation*}
 \sum_{n=0}^\infty a_n \text{bzw.} a_k=\sum_{n=0}^k a_n
\end{equation*}
$\rightarrow$ kann konvergieren oder divergieren \\
Bedingungen f\"ur Konvergenz:
\begin{itemize}
    \item{Nullfolge} $a_n\rightarrow 0$
    \item{Quotientenkriterium} $\lim\limits_{n\to\infty}|\frac{a_{n+1}}{a_n}|=q$ 
    \begin{align*}
    q<1&\Rightarrow \text{konvergent} \\
    q>1&\Rightarrow \text{divergent} \\
    q=1&\Rightarrow \text{keine Aussage}
    \end{align*}
\end{itemize}
\end{document}

Why aren't my equation blue too using \everymath? And how will they?

Might be an idea to add xcolor to your packages, otherwise MidnightBlue is not supported (are you working with beamer? given the class options) — daleif, Jun 08 '18 at 12:54
@PhelypeOleinik even the displayed equation? That remains black for me — daleif, Jun 08 '18 at 12:55
As mentioned adding xcolor then the coloring works on all but equation(*), the latter can be fixed by adding the etoolbox package and adding \AtBeginEnvironment{equation*}{\color{orange}} \AtBeginEnvironment{equation}{\color{orange}} — daleif, Jun 08 '18 at 13:04
@daleif do you mean that I should try to find out myself and then propose my thoughts or that you don't know? (sorry but I'm not a mother tongue) — gvgramazio, Jun 08 '18 at 13:25
@gvgramazio I have no idea why it is like that. I have called for reinforcements (some people that know more about it, hopefully they can explain it) — daleif, Jun 08 '18 at 13:29

score 1 · Answer 1 · answered Mar 27 '19 at 22:54

1

The following code works for me:

\documentclass[10pt,landscape,a4paper,svgnames,x11names]{article}

\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\usepackage[utopia,sfscaled]{mathdesign}
\usepackage{amsmath}
\usepackage{xcolor}

\everymath{\color{MidnightBlue}}

\begin{document} 
\section*{Reihen} 
\begin{equation*}
 \sum_{n=0}^\infty a_n \text{bzw.} a_k=\sum_{n=0}^k a_n
\end{equation*}
$\rightarrow$ kann konvergieren oder divergieren \\
Bedingungen f\"ur Konvergenz:
\begin{itemize}
    \item{Nullfolge} $a_n\rightarrow 0$
    \item{Quotientenkriterium} $\lim\limits_{n\to\infty}|\frac{a_{n+1}}{a_n}|=q$ 
    \begin{align*}
    q<1&\Rightarrow \text{konvergent} \\
    q>1&\Rightarrow \text{divergent} \\
    q=1&\Rightarrow \text{keine Aussage}
    \end{align*}
\end{itemize}
\end{document}

I simply invoked the xcolorpackage.

answered Mar 27 '19 at 22:54

Brasil

1,286

But it doesn't colour the equation* content. – Andrew Swann Apr 25 '19 at 10:20
It seems that the command \everymath{\color{MidnightBlue}} doesn't reach the equation environment. In that case, change that line by \begin{equation*} \color{MidnightBlue}. Another approach is to define a new environment based on equation that applies the desired color. – Brasil Apr 25 '19 at 12:58
Indeed; daleif gave one way to fix this in the comments above. – Andrew Swann Apr 25 '19 at 13:48

How to change the color of an equation?

1 Answers1