diff --git a/css/main.css b/css/main.css
index d25ce0e..6d19d97 100644
--- a/css/main.css
+++ b/css/main.css
@@ -315,13 +315,11 @@ label[for=user] {
 }
 
 #chart-close {
-  font-size: 0.8em;
   position: absolute;
   z-index: 10001;
-  right: 15px;
-  bottom: 160px;
+  right: 4px;
+  bottom: 166px;
   cursor: pointer;
-  color: #5070af;
 }
 
 .mi {
diff --git a/images/close_blue.svg b/images/close_blue.svg
new file mode 100644
index 0000000..43b9cd4
--- /dev/null
+++ b/images/close_blue.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
+  <path fill="#777" d="M12 2c5.514 0 10 4.486 10 10s-4.486 10-10 10-10-4.486-10-10 4.486-10 10-10zm0-2c-6.627 0-12 5.373-12 12s5.373 12 12 12 12-5.373 12-12-5.373-12-12-12zm5 15.538l-3.592-3.548 3.546-3.587-1.416-1.403-3.545 3.589-3.588-3.543-1.405 1.405 3.593 3.552-3.547 3.592 1.405 1.405 3.555-3.596 3.591 3.55 1.403-1.416z"/>
+</svg>
\ No newline at end of file
diff --git a/index.php b/index.php
index 4042e3f..bf1217e 100644
--- a/index.php
+++ b/index.php
@@ -151,7 +151,7 @@
         <div id="map-canvas"></div>
         <div id="bottom">
           <div id="chart"></div>
-          <a id="chart-close" data-bind="onChartToggle"><?= $lang['close'] ?></a>
+          <a id="chart-close" data-bind="onChartToggle"><img src="images/close_blue.svg" alt="<?= $lang['close'] ?>"></a>
         </div>
       </div>