Tweaked background colors

Author: dbouget

index.html

@@ -105,10 +105,10 @@
         <p></p>
       </div>
       <div class="w3-quarter">
-        <p><a href="#download" class="w3-button w3-white w3-padding-large w3-large w3-opacity w3-hover-opacity-off">Try now</a></p>
+        <p><a href="#download" class="w3-button w3-white w3-padding-large w3-large">Try now</a></p>
       </div>
       <div class="w3-quarter" style="margin-left:-50px">
-        <p><a href="https://github.com/raidionics" class="w3-button w3-white w3-padding-large w3-large w3-opacity w3-hover-opacity-off">View on GitHub</a></p>
+        <p><a href="https://github.com/raidionics" class="w3-button w3-white w3-padding-large w3-large">View on GitHub</a></p>
       </div>
     </div>
   </div>
@@ -149,10 +149,10 @@ <h3 class="w3-center">A description of the different use-cases supported by Raid
 </div>
 
 <!-- Team Section -->
-<div class="w3-container w3-dark-grey" style="padding:128px 16px" id="team">
+<div class="w3-container w3-blue-gray" style="padding:128px 16px" id="team">
   <h1 class="w3-center">THE TEAM</h1>
   <p class="w3-center w3-large">Core participants</p>
-  <div class="w3-row-padding w3-grayscale" style="margin-top:64px">
+  <div class="w3-row-padding" style="margin-top:64px">
     <div class="w3-col l3 m6 w3-margin-bottom" style="margin:auto">
       <div class="w3-card">
         <img src="/assets/photo-david.png" alt="David" style="width:50%; margin-left:23.5%">
@@ -198,7 +198,7 @@ <h3>Valeria Gaitan</h3>
       </div>
     </div>
   </div>
-  <div class="w3-row-padding w3-grayscale" style="margin-top:64px">
+  <div class="w3-row-padding" style="margin-top:64px">
     <div class="w3-col l3 m6 w3-margin-bottom" style="margin:auto">
       <div class="w3-card">
         <img src="/assets/photo-ingerid.png" alt="Ingerid" style="width:50%; margin-left:23.5%">
@@ -251,7 +251,7 @@ <h1 class="w3-center">Downloads</h1>
 </div>
 
 <!-- Examples Section -->
-<div class="w3-container w3-dark-grey" style="padding:128px 16px" id="examples">
+<div class="w3-container w3-teal" style="padding:128px 16px" id="examples">
   <h1 class="w3-center">Examples</h1>
   <div class="w3-center" style="margin-top:64px">
     <div class="w3-half">
@@ -294,7 +294,7 @@ <h2 class="w3-center w3-large">Related research</h2>
 </div>
 
 <!-- Contact Section -->
-<div class="w3-container w3-light-grey" style="padding:128px 16px" id="contact">
+<div class="w3-container w3-blue-gray" style="padding:128px 16px" id="contact">
   <h3 class="w3-center">CONTACT</h3>
   <p class="w3-center w3-large">Lets get in touch. Feel free to contact us for collaboration or data sharing.</p>
   <div style="margin-top:48px">