How can we use tikz package to draw a rectangle and fill it with a color for the equations?

Question

How can we use tikz package to draw a rectangle and fill it with a color for the equations? like the following

\documentclass{article}
\usepackage{tikz}
\usepackage{amsmath}
\begin{document}
\begin{equation}
f(x)=ax+b
\end{equation}
\end{document}

please have alook here -- https://tex.stackexchange.com/questions/75129/boxed-tikz-and-colored-equation-background — js bibra, Feb 09 '21 at 06:30
Take a look at: https://tex.stackexchange.com/questions/20575/attractive-boxed-equations/288326#288326 — Ignasi, Feb 09 '21 at 08:17

score 8 · Answer 1 · answered Feb 09 '21 at 06:28

\documentclass{article}
\usepackage{amsmath}
\usepackage[customcolors]{hf-tikz}
\begin{document}
\hfsetfillcolor{blue!10}
\hfsetbordercolor{blue}
\begin{equation}\label{e:barwq2}
\tikzmarkin{b}  f(x)=ax+b\tikzmarkend{b}\
\end{equation}
\end{document}

for white borders

\documentclass{article}
\usepackage{amsmath}
\usepackage[customcolors]{hf-tikz}
\begin{document}
\hfsetfillcolor{blue!20}
\hfsetbordercolor{white}
\begin{equation}\label{e:barwq2}
\tikzmarkin{b}  f(x)=ax+b\tikzmarkend{b}\
\end{equation}
\end{document}

Roland · Answer 2 · 2021-02-09T06:04:51.210

5

You want to use tcolorbox:

\documentclass{article}
\usepackage{amssymb}
\usepackage{tcolorbox}
\begin{document}
\begin{tcolorbox}[colback=blue!10,text width=5cm]

\begin{equation}
\centering  f(x)=ax+b
\end{equation}
    \end{tcolorbox}
\end{document}

with \tcbset{colframe=white}:

in tikz(but tcolorobx i think is the better one):

\documentclass{article}
\usepackage{amssymb}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\node [fill=cyan!20,text width=4cm] at (0,0) {\begin{equation}f(x)=ax+b\end{equation}};
\end{tikzpicture}

\end{document}

edited Feb 09 '21 at 06:04

answered Feb 09 '21 at 05:17

Roland

6,655

Thank you so much. – Momo Feb 09 '21 at 05:36
How can we do it without frame? – Momo Feb 09 '21 at 05:38
How can we do it with \usepackage{tikz}? because I'd like to use its color. – Momo Feb 09 '21 at 05:40
without frame use \tcbset{colframe=white} – Roland Feb 09 '21 at 05:57
you can also use : \begin{tcolorbox}[enhanced,colback=blue!10,text width=5cm, frame hidden] with \tcbuselibrary{skins} in the prehambule – flav Feb 09 '21 at 06:05
Thank you so much. – Momo Feb 09 '21 at 06:10
How can we make the number of equation outside ? – Momo Feb 09 '21 at 06:19
You can use \begin{equation*} and \end{equation*} in order to remove the numbering, but you needto load \usepackage{amsmath}. – Roland Feb 09 '21 at 06:35

How can we use tikz package to draw a rectangle and fill it with a color for the equations?

2 Answers2