diff --git a/web_timeline/README.rst b/web_timeline/README.rst
index d28816ec1..4fdaa788b 100755
--- a/web_timeline/README.rst
+++ b/web_timeline/README.rst
@@ -66,7 +66,7 @@ the possible attributes for the tag:
 +--------------------+-----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
 | colors             | No        | Allows to set certain specific colors if the expressed condition (JS syntax) is met.                                                                                                                                                                                      |
 +--------------------+-----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
-| color-field        | No        | Allows to set a field (on the current model) that contains the HTML color (e.g. #FFFFFF). This option has priority over 'colors'.                                                                                                                                         |
+| color_field        | No        | Allows to set a field (on the current model) that contains the HTML color (e.g. #FFFFFF). This option has priority over 'colors'.                                                                                                                                         |
 +--------------------+-----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
 | dependency_arrow   | No        | Set this attribute to a x2many field to draw arrows between the records referenced in the x2many field.                                                                                                                                                                   |
 +--------------------+-----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
diff --git a/web_timeline/static/description/index.html b/web_timeline/static/description/index.html
index 93b1494f6..1a8d73136 100644
--- a/web_timeline/static/description/index.html
+++ b/web_timeline/static/description/index.html
@@ -449,7 +449,7 @@ the possible attributes for the tag:</p>
 <td>No</td>
 <td>Allows to set certain specific colors if the expressed condition (JS syntax) is met.</td>
 </tr>
-<tr><td>color-field</td>
+<tr><td>color_field</td>
 <td>No</td>
 <td>Allows to set a field (on the current model) that contains the HTML color (e.g. #FFFFFF). This option has priority over ‘colors’.</td>
 </tr>