# ConTeXt: How to change the background color and border of a Pandoc-generated blockquote?

Consider the following minimum working example containing a blockquote as defined in a Pandoc-generated document:

\setuppapersize [A4][A4]
\setuplayout    [width=middle,  backspace=1.5in, cutspace=1.5in,
height=middle, topspace=0.75in, bottomspace=0.75in]

\setuppagenumbering[location={footer,center}]

\setupdelimitedtext
[blockquote]
[before={\blank[medium]},
after={\blank[medium]},
indentnext=no,
]

\starttext
\input tufte
\startblockquote
\input zapf
\stopblockquote
\input knuth
\stoptext

## Question

How could I obtain a light gray background for the blockquote with a dark red 1em-thick left vertical borderline only by changing the preamble? Other borders should be 0pt.

-

Since the text is marked up logically within a blockquote environment and pandoc includes custom headers included with the -H option after the default ones, you can simply create an environment which displays the text in the desired way using any mechanism which meets your needs.

I define a framedtext environment with the name blockquote and the desired features, which is used instead of the default definition.

\startsetups framedsetups
\setupwhitespace[medium]
\stopsetups

\defineframedtext
[blockquote]
[
framecolor=darkred,
background=color,
backgroundcolor=lightgray,
frame=off,
leftframe=on,
rulethickness=1em,
offset=overlay,
loffset=2em,
roffset=1em,
width=\textwidth,
setups=framedsetups,
]

which gives

Another option is to use background environment with the name blockquote. For example:

\definebackground
[blockquote]
[
framecolor=darkred,
background=color,
backgroundcolor=lightgray,
frame=off,
leftframe=on,
rulethickness=1em,
offset=overlay,
leftoffset=2em,
rightoffset=1em,
width=\textwidth,
setups=framedsetups,
before=\blank,
after=\blank,
]

which gives the same result as before, but has the advantage that the content can break across pages.

-
Using pandoc's -H option to overwrite pandoc environments is really clever. – Serge Stroobandt Sep 4 '13 at 13:26
I prefer textbackgrounds (or backgrounds) over framed as the latter does not break across pages. – Aditya Sep 5 '13 at 17:50
@Aditya Another drawback of using framedtext instead of textbackground is that whitespace between paragraphs is not printed. On the other hand, I could textbackground not get that far as to print only the left frame border. – Serge Stroobandt Oct 23 '13 at 19:40
@SergeStroobandt: See the edited answer to see how to add whitespace inside a framedtext and how to use background – Aditya Oct 24 '13 at 0:26
Can you give some more detail on how to do this? I tried copying the last code block into a blockquote.tex text file, and then including it with pandoc infile.md -o outfile.pdf -H blockquote.tex, but I get an ! Undefined control sequence. l.44 \definebackground error. – naught101 Oct 20 '14 at 2:25