Document how to increase contrast in EWW/shr

* doc/misc/eww.texi (Advanced): Document increasing contrast with
shr-color-visible-distance-min and
shr-color-visible-luminance-min.

2 files changed, 15 insertions, 0 deletions

diff --git a/doc/misc/ChangeLog b/doc/misc/ChangeLog
index 36134cdc8d1..441285647bd 100644
--- a/doc/misc/ChangeLog
+++ b/doc/misc/ChangeLog
@@ -1,3 +1,9 @@
+2014-11-07  Tassilo Horn  <tsdh@gnu.org>
+
+        * eww.texi (Advanced): Document increasing contrast with
+        shr-color-visible-distance-min and
+        shr-color-visible-luminance-min.
+
 2014-11-02  Teodor Zlatanov  <tzz@lifelogs.com>
 
         * auth.texi (Help for users): Explain quoting rules better.
diff --git a/doc/misc/eww.texi b/doc/misc/eww.texi
index c22a41e451c..f8f87d37a39 100644
--- a/doc/misc/eww.texi
+++ b/doc/misc/eww.texi
@@ -195,6 +195,15 @@ of the width and height.  If Emacs supports image scaling (ImageMagick
 support required) then larger images are scaled down.  You can block
 specific images completely by customizing @code{shr-blocked-images}.
 
+@vindex shr-color-visible-distance-min
+@vindex shr-color-visible-luminance-min
+@cindex Contrast
+  EWW (or rather its HTML renderer @code{shr}) use the colors declared
+in the HTML page but adjust them if needed to keep a certain minimum
+contrast.  If that is still to low for you, have a look at the
+variables @code{shr-color-visible-distance-min} and
+@code{shr-color-visible-luminance-min}.
+
 @node History and Acknowledgments
 @appendix History and Acknowledgments