Ihor Radchenko <yantar92@posteo.net> writes:

> Adam Porter <adam@alphapapa.net> writes:
>
>>> I am not sure if centered text should stand out.
>>> AFAIU, you want to add this style for the sole purpose of highlighting
>>
>> What is the purpose of centering text if not to make it stand out?
>
> To align text. I am not sure why anything more is necessary - it
> is certainly counter-intuitive for me that "center" means something more
> than just alignment.
>
> If you need extra highlighting, we may introduce a dedicated style and
> apply it via special block.

I defined a "kasten" block for my own page, maybe you can re-use that:

# ELISP
(add-to-list 'org-structure-template-alist '("k" "#+begin_kasten\n?\n#+end_kasten" "<div class=\"kasten\">?</div>"))

# ORG-MODE
# kasten-Environment for full-width boxed text.
#+latex_header: \definecolor{cream}{rgb}{1.0, 0.99, 0.82}
#+latex_header: \provideenvironment{kasten}% level0
#+latex_header:     {\begin{tcolorbox}[colback=cream, sharp corners]%
#+latex_header:         \medskip%
#+latex_header:     }
#+latex_header:     {\medskip\end{tcolorbox}%
#+latex_header:     }

# CSS:
/* full-width boxed text */
.kasten {
    color: #111;
    text-align: justify;
    clear: both;
    border-top: 1px solid gray !important;
    border-right: 0px none gray !important;
    border-left: 0px none gray !important;
    border-bottom: 1px solid gray !important;
    background-color: #f6efca;
    border-top: thin solid gray;
    border-bottom: thin solid gray;
    float: left;
    width: 100%;
    z-index: 1;
    margin-top:20px;
    margin-bottom:20px;
}

Best wishes,
Arne
-- 
Unpolitisch sein
heißt politisch sein,
ohne es zu merken.
draketo.de