
\PassOptionsToPackage{svgnames}{xcolor}
\documentclass[twocolumn,a4paper]{article}
\usepackage{tcolorbox}
\tcbuselibrary{skins,breakable}
\usetikzlibrary{shadings,shadows}
\newenvironment{gblock}[1]{%
\tcolorbox[beamer,%
noparskip,breakable,
colback=LightGreen,colframe=DarkGreen,%
colbacklower=LimeGreen!75!LightGreen,%
title=#1]}%
{\endtcolorbox}
\begin{document}
\begin{gblock}{Example of \texttt{exampleblock}}
wwwwwwwwwwwwww
\end{gblock}
\end{document}
Or you may also like this
\begin{tcolorbox}
[colback=white!100,colframe=red!75!black,width=10cm,
righttitle=0.5cm,subtitle style={boxrule=0.4pt,
colback=yellow!50!red!25!white},title= \bf{qqqqqqqq}\hfill
\bf{qqqqqqqqqqq}]
\begin{center}\bf{aaaaaaaaa}\end{center}
\tcblower
qqqqqqqqqqqqq
\end{tcolorbox}

blockenvironment depends on thebeamertheme you use, but if you're referring the the more colorful ones, you can achieve a similar output using thetcolorboxpackage in your article. – leandriis Sep 26 '21 at 20:37