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Can anyone please help me to do how to become blue the number 1.12? number

Marcos Paulo
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    Welcome to TeX.SX! Please add an example document to the question that reproduces the above output – siracusa Oct 12 '18 at 06:01

1 Answers1

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Here is a possible solution with declaring a new theoremstyle, using the documentation of amsthm:

\documentclass{article}
\usepackage{xcolor}
\usepackage{lipsum}
\usepackage{amsthm}

\newtheoremstyle{note}% 
{3pt}%Space above
{3pt}%Space below
{}%Body font
{}%Indent amount
{}%Theorem head font
{.}%Punctuation after theorem head
{.5em}%Space after theorem head
{\textcolor{blue}{\textbf{\thmname{#1} \thmnumber{#2}}}}% Theorem head spec (can be left empty, meaning ‘normal’)

\theoremstyle{note}
\newtheorem{thm}{Exemplo}
\begin{document}
    \begin{thm}
        \lipsum[1]
    \end{thm}
\end{document}

enter image description here

bmv
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  • Your solution worked fine here! But, considering that you used commands that I have never seen before, please provide me more details about the following: 1) Why did you put note in "\newtheoremstyle{note}"?. 2) What do "{}%Body font" and "{}%Indent amount" mean? 3) Can I put the dot in blue in "{.}%Punctuation after theorem head". 4) Can I replace "em" for "cm" in "{.5em}" ? – Marcos Paulo Oct 12 '18 at 13:18
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    @MarcosPaulo 1) "note" is just a unique identifier for the theorem style being declared; another name would also work, 2) these are both arguments for \newtheoremstyle, you may want to have a look at the the amsthm usage guide, 3) yeah, {\textblue{.}} would do that, 4) you could use cm instead, but the advantage of em as a unit is that it scales with the font size (see e.g. this answer). – Circumscribe Oct 12 '18 at 21:37