diff --git a/include/color_classes/differential.hpp b/include/color_classes/differential.hpp
index a4b005b..d51f26f 100644
--- a/include/color_classes/differential.hpp
+++ b/include/color_classes/differential.hpp
@@ -301,12 +301,10 @@ struct differential {
             num_metadata += it.position() - prev_position;
             prev_position = it.position();
 
-            uint64_t curr_differential_list_size = 0;
             for (uint64_t i = 0; i < size; i++) {
                 util::read_delta(it);
                 uint64_t delta_size = it.position() - prev_position;
                 num_differential_lists += delta_size;
-                curr_differential_list_size += delta_size;
 
                 prev_position = it.position();
             }
@@ -341,6 +339,47 @@ struct differential {
         std::cout << std::endl;
     }
 
+    void dump(std::ofstream& os) const {
+        /* header info */
+        const uint64_t num_differential_color_sets = num_partitions();
+        const uint64_t num_color_lists = num_color_sets();
+        os << "num_differential_color_sets " << num_differential_color_sets << '\n';
+        os << "num_color_sets " << num_color_lists << '\n';
+
+        uint64_t last_representative = m_representative_offsets.access(num_partitions());
+
+        /* dump meta-color lists */
+        uint64_t old_representative_begin = num_partitions();
+        for (uint64_t representative_id = 0, color_set_id = 0; color_set_id != num_color_lists; ++color_set_id) {
+
+            const uint64_t representative_begin = m_representative_offsets.access(m_clusters.rank(color_set_id));
+            if (representative_begin != old_representative_begin){
+                const std::vector<uint64_t> representative_set = read_representative_set(representative_begin);
+                const uint64_t list_size = representative_set.size();
+                os << "representative_color_list_" << representative_id++ << ' ' << list_size << ' ';
+
+                for (uint64_t i = 0; i != list_size; ++i) {
+                    os << representative_set[i];
+                    if (i != list_size - 1) os << ' ';
+                }
+                os << '\n';
+
+                old_representative_begin = representative_begin;
+            }
+
+            const uint64_t differential_begin = m_list_offsets.access(color_set_id) + last_representative;
+            const std::vector<uint64_t> differential_set = read_differential_set(differential_begin);
+            const uint64_t list_size = differential_set.size();
+            os << "differential_color_list_" << color_set_id << ' ' << list_size << ' ';
+            
+            for (uint64_t i = 0; i != list_size; ++i) {
+                os << differential_set[i];
+                if (i != list_size - 1) os << ' ';
+            }
+            os << '\n';
+        }
+    }
+
     template <typename Visitor>
     void visit(Visitor& visitor) {
         visitor.visit(m_num_docs);
@@ -357,6 +396,35 @@ struct differential {
 
     std::vector<uint64_t> m_colors;
     ranked_bit_vector m_clusters;
+
+    std::vector<uint64_t> read_representative_set(uint64_t begin) const {
+        auto it = bit_vector_iterator(m_colors.data(), m_colors.size(), begin);
+        uint64_t size = util::read_delta(it);
+
+        if (size == 0) return {};
+
+        std::vector<uint64_t> set(size);
+        set[0] = util::read_delta(it);
+        for(uint64_t i = 1; i != size; ++i){
+            set[i] = set[i-1] + util::read_delta(it) + 1;
+        }
+        return set;
+    }
+
+    std::vector<uint64_t> read_differential_set(uint64_t begin) const {
+        auto it = bit_vector_iterator(m_colors.data(), m_colors.size(), begin);
+        uint64_t size = util::read_delta(it);
+        util::read_delta(it); // skip color_set size
+
+        if (size == 0) return {};
+
+        std::vector<uint64_t> set(size);
+        set[0] = util::read_delta(it);
+        for(uint64_t i = 1; i != size; ++i){
+            set[i] = set[i-1] + util::read_delta(it) + 1;
+        }
+        return set;
+    }
 };
 
 }  // namespace fulgor
diff --git a/tools/util.cpp b/tools/util.cpp
index 29b7521..506f3ba 100644
--- a/tools/util.cpp
+++ b/tools/util.cpp
@@ -85,6 +85,12 @@ int dump_colors(int argc, char** argv) {
     if (sshash::util::ends_with(index_filename,
                                 constants::meta_colored_fulgor_filename_extension)) {
         dump_colors<meta_index_type>(index_filename, output_filename);
+    } else if (sshash::util::ends_with(index_filename,
+                                       constants::meta_diff_colored_fulgor_filename_extension)) {
+        dump_colors<meta_differential_index_type>(index_filename, output_filename);
+    } else if (sshash::util::ends_with(index_filename,
+                                       constants::diff_colored_fulgor_filename_extension)) {
+        dump_colors<differential_index_type>(index_filename, output_filename);
     } else if (sshash::util::ends_with(index_filename, constants::fulgor_filename_extension)) {
         dump_colors<index_type>(index_filename, output_filename);
     } else {