override bootstrap colors

customize.dist/main.css

@@ -469,6 +469,9 @@ html.cp,
  *  Currently only used by /poll/
  */
 }
+.cp .btn-primary {
+  background-color: #00ADEE;
+}
 .cp body {
   font-size: 1rem;
   font-weight: 400;

customize.dist/src/less/cryptpad.less

@@ -18,6 +18,11 @@ html.cp, .cp body {
 
 .cp {
 
+// override bootstrap colors
+.btn-primary {
+    background-color: @cp-blue;
+}
+
 body {
     font-size: 1rem;
     font-weight: 400;