diff --git a/conf.py b/conf.py
index 209b03e0..104c5bcb 100644
--- a/conf.py
+++ b/conf.py
@@ -92,7 +92,7 @@ def setup(app):
 
 # The name of an image file (relative to this directory) to place at the top
 # of the sidebar.
-html_logo = "img/logo_rtd_white.svg"
+html_logo = "img/logo_hfc_00.png"
 html_theme_options = {
     'logo_only': True,
     'display_version': False,
diff --git a/img/logo_RTD.png b/img/logo_RTD.png
new file mode 100644
index 00000000..39ed418c
Binary files /dev/null and b/img/logo_RTD.png differ
diff --git a/img/logo_RTD.svg b/img/logo_RTD.svg
index f8266aa9..54a788d5 100644
--- a/img/logo_RTD.svg
+++ b/img/logo_RTD.svg
@@ -26,9 +26,9 @@
      borderopacity="1.0"
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
-     inkscape:zoom="1.8826087"
-     inkscape:cx="345"
-     inkscape:cy="88"
+     inkscape:zoom="1.6728111"
+     inkscape:cx="365"
+     inkscape:cy="62"
      inkscape:document-units="mm"
      inkscape:current-layer="layer1"
      showgrid="false"
@@ -40,10 +40,21 @@
      inkscape:guide-bbox="true"
      units="px"
      inkscape:window-width="1920"
-     inkscape:window-height="1051"
-     inkscape:window-x="-9"
-     inkscape:window-y="-9"
-     inkscape:window-maximized="1" />
+     inkscape:window-height="1027"
+     inkscape:window-x="1272"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1">
+    <sodipodi:guide
+       position="72.519053,13.010062"
+       orientation="1,0"
+       id="guide5736"
+       inkscape:locked="false" />
+    <sodipodi:guide
+       position="176.70368,16.100768"
+       orientation="1,0"
+       id="guide5812"
+       inkscape:locked="false" />
+  </sodipodi:namedview>
   <metadata
      id="metadata5">
     <rdf:RDF>
@@ -60,16 +71,17 @@
      inkscape:label="Livello 1"
      inkscape:groupmode="layer"
      id="layer1"
-     transform="translate(-19.371281,-196.30714)">
+     transform="translate(-19.371281,-196.30714)"
+     style="opacity:0.99">
     <text
        xml:space="preserve"
        style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:38.91463852px;line-height:125%;font-family:Trueno;-inkscape-font-specification:Trueno;letter-spacing:0px;word-spacing:0px;fill:#7da629;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       x="24.333036"
+       x="21.336679"
        y="230.76123"
        id="text50"><tspan
          sodipodi:role="line"
          id="tspan48"
-         x="24.333036"
+         x="21.336679"
          y="230.76123"
          style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:Trueno;-inkscape-font-specification:'Trueno Bold';fill:#000000;fill-opacity:1;stroke-width:0.26458332px">H<tspan
    style="fill:#000000;stroke:#000000;stroke-width:0.26458332px"
@@ -79,25 +91,25 @@
     <text
        xml:space="preserve"
        style="font-style:normal;font-weight:normal;font-size:1.18098032px;line-height:0%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.28222224"
-       x="114.95704"
-       y="238.07445"
+       x="114.50729"
+       y="237.9845"
        id="text3022"><tspan
          sodipodi:role="line"
          id="tspan3024"
-         x="114.95704"
-         y="238.07445"
+         x="114.50729"
+         y="237.9845"
          style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.93939781px;line-height:1.25;font-family:'Courier New';-inkscape-font-specification:'Courier New';stroke-width:0.28222224">RTD by @opendatasicilia</tspan></text>
     <text
        xml:space="preserve"
-       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:6.25354862px;line-height:125%;font-family:Trueno;-inkscape-font-specification:Trueno;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       x="26.483429"
-       y="238.12128"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:6.02272987px;line-height:125%;font-family:Trueno;-inkscape-font-specification:Trueno;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.25481755px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="24.388174"
+       y="237.89233"
        id="text960"><tspan
          sodipodi:role="line"
          id="tspan958"
-         x="26.483429"
-         y="238.12128"
-         style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:Trueno;-inkscape-font-specification:'Trueno Bold';stroke-width:0.26458332px">Help field calculator</tspan></text>
+         x="24.388174"
+         y="237.89233"
+         style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:Trueno;-inkscape-font-specification:'Trueno Bold';stroke-width:0.25481755px">Help field calculator</tspan></text>
     <image
        y="182.4417"
        x="72.859901"
diff --git a/img/logo_hfc_00.png b/img/logo_hfc_00.png
new file mode 100644
index 00000000..db644f12
Binary files /dev/null and b/img/logo_hfc_00.png differ
diff --git a/img/logo_hfc_01.png b/img/logo_hfc_01.png
new file mode 100644
index 00000000..212df529
Binary files /dev/null and b/img/logo_hfc_01.png differ
diff --git a/static/theme_overrides.css b/static/theme_overrides.css
index 586da231..ef575a40 100644
--- a/static/theme_overrides.css
+++ b/static/theme_overrides.css
@@ -29,6 +29,7 @@ p {text-align: justify;}
 /* adatta il nav-content a fullhd */
 .wy-nav-content {max-width: 1920px;}
 
+/* background menu sx*/
 .wy-side-nav-search {background: linear-gradient(#67b03a, #589632); }