documentclass[aspectratio=169]{beamer}
usepackage[skins]{tcolorbox}
usecolortheme{rose}
newenvironment{consoleBox}
{usebeamercolor{block title}usebeamercolor{block body}%
  begin{tcolorbox}[sharp corners,frame empty,coltitle=block title.fg,%
    colbacktitle=block title.bg,colback=block body.bg,title=Console,%
    boxrule=0.5pt,arc=4pt,left=0pt,right=6pt,top=6pt]}
  {end{tcolorbox}}
begin{document}
begin{frame}
frametitle{Problem}

  begin{block}{Console}
    This is the desired appearance.
  end{block}

  begin{consoleBox}
    This is close but not quite right.  The body background is way too
    dark and the title background is a little too dark.
  end{consoleBox}

  begin{tcolorbox}[skin=beamer,title=Console]
    This is an attempt with skins...one might think that the beamer
    skin would use the beamer color theme?
  end{tcolorbox}


end{frame}
end{document}