diff --git a/doc/doxyfile.in b/doc/doxyfile.in
index 3cb4116e7..a50712af4 100644
--- a/doc/doxyfile.in
+++ b/doc/doxyfile.in
@@ -1414,7 +1414,7 @@ HTML_COLORSTYLE        = LIGHT
 # Minimum value: 0, maximum value: 359, default value: 220.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_COLORSTYLE_HUE    = 220
+HTML_COLORSTYLE_HUE    = 85
 
 # The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the colors
 # in the HTML output. For a value of 0 the output will use gray-scales only. A
diff --git a/doc/doxygen.css b/doc/doxygen.css
index 81655d3db..a7a144818 100644
--- a/doc/doxygen.css
+++ b/doc/doxygen.css
@@ -1295,7 +1295,7 @@ div.contents ul li {
     width: 24px;
     height: 18px;
     margin-bottom: 4px;
-    background-image:url('folderopen.png');
+    background-image:url('folderopen.svg');
     background-position: 0px -4px;
     background-repeat: repeat-y;
     vertical-align:top;
@@ -1306,7 +1306,7 @@ div.contents ul li {
     width: 24px;
     height: 18px;
     margin-bottom: 4px;
-    background-image:url('folderclosed.png');
+    background-image:url('folderclosed.svg');
     background-position: 0px -4px;
     background-repeat: repeat-y;
     vertical-align:top;
@@ -1317,7 +1317,7 @@ div.contents ul li {
     width: 24px;
     height: 18px;
     margin-bottom: 4px;
-    background-image:url('doc.png');
+    background-image:url('doc.svg');
     background-position: 0px -4px;
     background-repeat: repeat-y;
     vertical-align:top;