org-format-latex-options

org-format-latex-options is a variable defined in `org.el'.
Its value is

(:foreground default :background default :scale 1.0 :html-foreground "Black" :html-background "Transparent" :html-scale 1.0 :matchers
	     ("begin" "$1" "$" "$$" "\\(" "\\["))

Documentation:
Options for creating images from LaTeX fragments.
This is a property list with the following properties:
:foreground the foreground color for images embedded in Emacs, e.g. "Black".
`default' means use the foreground of the default face.
`auto' means use the foreground from the text face.
:background the background color, or "Transparent".
`default' means use the background of the default face.
`auto' means use the background from the text face.
:scale a scaling factor for the size of the images, to get more pixels
:html-foreground, :html-background, :html-scale
the same numbers for HTML export.
:matchers a list indicating which matchers should be used to
find LaTeX fragments. Valid members of this list are:
"begin" find environments
"$1" find single characters surrounded by $.$
"$" find math expressions surrounded by $...$
"$$" find math expressions surrounded by $$....$$
"\(" find math expressions surrounded by \(...\)
"\[" find math expressions surrounded by \[...\]

You can customize this variable.