diff --git a/docs/ase-file-specs.md b/docs/ase-file-specs.md
index 75b66052b..95f7db3ea 100644
--- a/docs/ase-file-specs.md
+++ b/docs/ase-file-specs.md
@@ -279,6 +279,10 @@ Never used.
 
 ### Tags Chunk (0x2018)
 
+After tha tags chunk, you can write one user data chunk for each tag.
+E.g. if there are 10 tags, you can then write 10 user data chunks one
+for each tag.
+
     WORD        Number of tags
     BYTE[8]     For future (set to zero)
     + For each tag
@@ -290,6 +294,9 @@ Never used.
                   2 = Ping-pong
       BYTE[8]   For future (set to zero)
       BYTE[3]   RGB values of the tag color
+                  Deprecated, used only for backward compatibility with Aseprite v1.2.x
+                  The color of the tag is the one in the user data field following
+                  the tags chunk
       BYTE      Extra byte (zero)
       STRING    Tag name
 
@@ -313,7 +320,10 @@ Never used.
 
 Insert this user data in the last read chunk.  E.g. If we've read a
 layer, this user data belongs to that layer, if we've read a cel, it
-belongs to that cel, etc.
+belongs to that cel, etc. There are some special cases: After a Tags
+chunk, there will be several user data fields, one for each tag, you
+should associate the user data in the same order as the tags are in
+the Tags chunk.
 
     DWORD       Flags
                   1 = Has text
diff --git a/src/dio/aseprite_decoder.cpp b/src/dio/aseprite_decoder.cpp
index 17a792e4b..2ce9d2d79 100644
--- a/src/dio/aseprite_decoder.cpp
+++ b/src/dio/aseprite_decoder.cpp
@@ -85,7 +85,10 @@ bool AsepriteDecoder::decode()
   doc::Cel* last_cel = nullptr;
   auto tag_it = sprite->tags().begin();
   auto tag_end = sprite->tags().end();
+
+  // Used to read user data for each tag after a Tags chunk
   bool tagsInProcess = false;
+
   int current_level = -1;
   doc::LayerList allLayers;
   AsepriteExternalFiles extFiles;
@@ -202,10 +205,13 @@ bool AsepriteDecoder::decode()
             break;
 
           case ASE_FILE_CHUNK_TAGS:
-            tagsInProcess = true;
             readTagsChunk(&sprite->tags());
             tag_it = sprite->tags().begin();
             tag_end = sprite->tags().end();
+
+            // If there are tags, any following user data chunk will
+            // be for each tag (starting from tag_it to tag_end-1).
+            tagsInProcess = (tag_it != tag_end);
             break;
 
           case ASE_FILE_CHUNK_SLICES: {
@@ -223,20 +229,25 @@ bool AsepriteDecoder::decode()
           case ASE_FILE_CHUNK_USER_DATA: {
             doc::UserData userData;
             readUserDataChunk(&userData);
-            // The next condition implies user data is from tags
+
+            // Are we are reading the user data of tags?
             if (tagsInProcess) {
-              // Tag user data:
               doc::Tag* tag = *tag_it;
-              doc::color_t c = tag->color();// this line is for backward compatibility
+              // This will overwrite the tag color. The color field in
+              // Tags chunk is deprecated, only used for backward
+              // compatibility with old versions of Aseprite, we now
+              // use the color from the user data chunk.
               tag->setUserData(userData);
-              tag->setColor(c);// this line is for backward compatibility
               tag_it++;
+
+              // Avoid reading more user data chunks than tags (this
+              // can happen in ill-formed files only)
               if (tag_it == tag_end)
                 tagsInProcess = false;
-              break;
             }
-            else if (last_object_with_user_data)
+            else if (last_object_with_user_data) {
               last_object_with_user_data->setUserData(userData);
+            }
             break;
           }
 
@@ -948,7 +959,12 @@ void AsepriteDecoder::readTagsChunk(doc::Tags* tags)
     std::string name = readString();
 
     auto tag = new doc::Tag(from, to);
-    tag->setColor(doc::rgba(r, g, b, 255));// this line is for backward compatibility
+
+    // We read the color field just in case that this is a .aseprite
+    // file written by an old version of Aseprite (where the there are
+    // not user data for tags).
+    tag->setColor(doc::rgba(r, g, b, 255));
+
     tag->setName(name);
     tag->setAniDir((doc::AniDir)aniDir);
     tags->add(tag);