Putting definitions in color boxes

Question

I've found a awesome document (doing some research in Model Theory).

I would like to know how I can do those color boxes for definitions, theorems and other stuff. Thanks a lot!

Answer 1

You can do like this

\documentclass[border=5mm]{standalone}
\usepackage[most]{tcolorbox}

\newtcolorbox{myBox}[3][]{
arc=5mm,
lower separated=false,
fonttitle=\bfseries,
colbacktitle=green!10,
coltitle=green!50!black,
enhanced,
attach boxed title to top left={xshift=0.5cm,
        yshift=-2mm},
colframe=green!50!black,
colback=green!10,
overlay={
\node[draw=green!50!black,thick,
%inner sep=2mm,
fill= green!10,rounded corners=1mm, 
yshift=0pt, 
xshift=-0.5cm, 
left, 
text=green!50!black,
anchor=east,
font=\bfseries] 
at (frame.north east) {#3};},
title=#2,#1}

\begin{document}


\begin{myBox}[]{content}{Some}
content text content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text 
\end{myBox}

\end{document}

UPDATE: sequence number to the definition

\documentclass{article}
\usepackage[most]{tcolorbox}

\newtcolorbox[auto counter,number within=subsection]{myBox}[3][]{
arc=5mm,
lower separated=false,
fonttitle=\bfseries,
colbacktitle=green!10,
coltitle=green!50!black,
enhanced,
attach boxed title to top left={xshift=0.5cm,
        yshift=-2mm},
colframe=green!50!black,
colback=green!10,
overlay={
\node[draw=green!50!black,thick,
%inner sep=2mm,
fill= green!10,rounded corners=1mm, 
yshift=0pt, 
xshift=-0.5cm, 
left, 
text=green!50!black,
anchor=east,
font=\bfseries] 
at (frame.north east) {#3};},
overlay={
\node[draw=green!50!black,thick,
%inner sep=2mm,
fill= green!10,rounded corners=1mm, 
yshift=0pt, 
xshift=-0.5cm, 
left, 
text=green!50!black,
anchor=east,
font=\bfseries] 
at (frame.north east) {#3};},
title=#2 \thetcbcounter,#1}



\begin{document}

\section{section title}
\subsection{subsection title}
\begin{myBox}[]{Content}{Some}
Content text content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text  content text 
\end{myBox}

\end{document}