For some reason space is added after my equation when I colour it. This does not happen if the colour is added to text.
Is there a simple way to prevent this from happening, like a global setting (I am not interested in manually adjusting the space with \vspace{-1cm}
)? Perhaps there is a better way to colour my equation (another package, another command, etc), or in other words, am I doing something wrong?
\documentclass[12pt]{standalone}
\usepackage{amsmath}
\usepackage{color}
\begin{document}
\begin{minipage}{4cm}
\begin{equation*}
a = b + c
\end{equation*}
\begin{align*}
a - b &= c\\
a-c & b
\end{align*}
\end{minipage}
\vline
\begin{minipage}{4cm}
\begin{equation*}
\color{blue} a = b + c
\end{equation*}
\begin{align*}
a - b &= c\\
a-c & b
\end{align*}
\end{minipage}
\end{document}
For reference, the closest question I found to this one doesn't seem to solve my problem, ie, adding \fboxsep0pt
to my preamble did not change the output.
EDIT
The comment With {\color{blue}a = b + c} there is no additional space ...
solves part of the problem, but it doesn't work when using for example align
(it gives an error):
\begin{align*}
{\color{blue} a - b &= c}\\
a-c &= b
\end{align*}
If I try to fix this using the command twice leaving the & outside, the spacing around =
is wrong:
\begin{align*}
{\color{blue} a - b} &{\color{blue}= c}\\
a-c &= b
\end{align*}
Best Answer
Oh. It's an AMS bug, the alignment is not color safe . Never noticed that before:-) In that case you need explicit grouping (use begingroup rather than bgroup or
{
as it's rather less intrusive into math spacing)It's actually a bit harsh to call it an AMS bug, the same effect is seen with
\[
in LaTeX however rather than grouping each case, this is probably the correct fix (anywhere in the preamble after loadingamsmath
. I'll ping @barbarabeeton