tcolorbox
I would like to have transparent background in tcolorbox.
Most time colback=white is a work-around but it is not clean.
\documentclass{article}
\usepackage{pagecolor}
\pagecolor{yellow}
\usepackage{tcolorbox}
\begin{document}
\begin{tcolorbox}[
title=Title,
% opacityback=1, % this does not work
% colback=white, % this is not what I want
]
This should have transparent backround. \\
Background should look yellow.
\end{tcolorbox}
\end{document}
I know you asked for a non-wrapfig answer, though it is unclear why. They can work together. More importantly, I think, is that tcolorbox doesn't care much about how things outside the "colorboxes" look or behave, while wrapfig only cares about wrapping things around other things....
\documentclass{book}
\usepackage[most]{tcolorbox}
\usepackage{lipsum, wrapfig}
% change "top" vertical spacing in wrapfig
\setlength{\intextsep}{0pt}
\begin{document}
\chapter{First}
\section{Furst}
\subsection{Ok}
%Defining a newtcolorbox to be a standard box for all examples in the text:
\newtcolorbox[auto counter,number
within=section]{phbox}[1][]{skin=bicolor,
title=Figure~\thetcbcounter,#1,
size=title,colback=white,colbacklower=black!10!white}
Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
\begin{wrapfigure}[14]{r}[0pt]{5cm}
\begin{phbox}[label={fig:label},width=\linewidth]
\tcbincludepdf[scale=1,size=tight,opacityframe=0]{example-image.pdf}
\tcblower
Here is a bunch of text to explain a figure.
\end{phbox}
\end{wrapfigure}
Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur? At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere
\end{document}
Once you change the name, since \newbox is already defined by TeX and your document warns tou about this:
! LaTeX Error: Command \newbox already defined.
Or name \end... illegal, see p.192 of the manual.
and use the proper name for the environment in your document, as in
\begin{Newbox}{Title}
Some text
\end{Newbox}
and not with \begin{newblock} \end{beamerblock3} which your original coe had, you'll see it works:
\documentclass{article}
\usepackage{tcolorbox}
\newenvironment{Newbox}[1]
{\tcolorbox[noparskip,colback=red!5!white,colframe=green!45!black,arc=1mm,title=#1,halign title = center]}
{\endtcolorbox}
\begin{document}
\begin{Newbox}{Title}
Some text
\end{Newbox}
\end{document}
However, this part of the error message you report
I do not know the key '/tcb/halign title' and I am going to ignore it.
suggests that you are using an outdated version of tcolorbox. Update to the latest version (2015/06/12 version 3.61 at the moment of this answer).
Best Answer
Thanks to flav.
Transparent background in tcolorbox is only possible with the skin key
standard jigsaw. Otherwise there is no effect of the keyopacityback=0