diff --git a/svg01.cpp b/svg01.cpp
index f0714c1..41b9ab6 100644
--- a/svg01.cpp
+++ b/svg01.cpp
@@ -1,6 +1,7 @@
 #include "svg01.h"
 #include <vector>
 #include <iostream>
+#include <string>
 
 using namespace std;
 
@@ -25,13 +26,12 @@ svg_text(double left, double baseline, string text) {
 }
 
 void
-svg_rect(double x, double y, double width, double height, string stroke = "midnightblue", string fill = "deeppink"){
+svg_rect(double x, double y, double width, double height, string stroke, string fill){
     cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << "'/>";
 }
 
-
 void
-show_histogram_svg(const vector<size_t>& bins) {
+show_histogram_svg(const vector<size_t>& bins, string stroke, string fill) {
     const auto IMAGE_WIDTH = 400;
     const auto IMAGE_HEIGHT = 300;
     const auto TEXT_LEFT = 20;
@@ -51,7 +51,7 @@ show_histogram_svg(const vector<size_t>& bins) {
     for (size_t bin : bins) {
         const double bin_width = (( IMAGE_WIDTH - TEXT_WIDTH ) / BLOCK_WIDTH ) * ( bin / maxel );
         svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
-        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, stroke, fill);
         top += BIN_HEIGHT;
     }
     svg_end();