diff --git a/components/style/properties/data.py b/components/style/properties/data.py
index cdf4560783b..6fe7a16257c 100644
--- a/components/style/properties/data.py
+++ b/components/style/properties/data.py
@@ -84,12 +84,13 @@ def arg_to_bool(arg):
 
 
 class Longhand(object):
-    def __init__(self, style_struct, name, animatable=None, derived_from=None, keyword=None,
+    def __init__(self, style_struct, name, spec="NO SPEC", animatable=None, derived_from=None, keyword=None,
                  predefined_type=None, custom_cascade=False, experimental=False, internal=False,
                  need_clone=False, need_index=False, gecko_ffi_name=None, depend_on_viewport_size=False,
                  allowed_in_keyframe_block=True, complex_color=False, cast_type='u8',
                  has_uncacheable_values=False, logical=False):
         self.name = name
+        self.spec = spec
         self.keyword = keyword
         self.predefined_type = predefined_type
         self.ident = to_rust_ident(name)
@@ -130,9 +131,10 @@ class Longhand(object):
 
 
 class Shorthand(object):
-    def __init__(self, name, sub_properties, experimental=False, internal=False,
+    def __init__(self, name, sub_properties, spec="NO SPEC", experimental=False, internal=False,
                  allowed_in_keyframe_block=True):
         self.name = name
+        self.spec = spec
         self.ident = to_rust_ident(name)
         self.camel_case = to_camel_case(self.ident)
         self.derived_from = None
diff --git a/components/style/properties/helpers.mako.rs b/components/style/properties/helpers.mako.rs
index e1fac491910..689a179df3f 100644
--- a/components/style/properties/helpers.mako.rs
+++ b/components/style/properties/helpers.mako.rs
@@ -185,6 +185,7 @@
         if property is None:
             return ""
     %>
+    /// ${property.spec}
     pub mod ${property.ident} {
         #![allow(unused_imports)]
         % if not property.derived_from:
@@ -389,6 +390,7 @@
                                        **kwargs)
 %>
     % if shorthand:
+    /// ${shorthand.spec}
     pub mod ${shorthand.ident} {
         #[allow(unused_imports)]
         use cssparser::Parser;
diff --git a/components/style/properties/longhand/color.mako.rs b/components/style/properties/longhand/color.mako.rs
index 38c8e79f5ab..8012defab54 100644
--- a/components/style/properties/longhand/color.mako.rs
+++ b/components/style/properties/longhand/color.mako.rs
@@ -6,7 +6,8 @@
 
 <% data.new_style_struct("Color", inherited=True) %>
 
-<%helpers:raw_longhand name="color" need_clone="True" animatable="True">
+<%helpers:raw_longhand name="color" need_clone="True" animatable="True"
+                       spec="https://drafts.csswg.org/css-color/#color">
     use cssparser::Color as CSSParserColor;
     use cssparser::RGBA;
     use values::specified::{CSSColor, CSSRGBA};