fix(navigaiton-bar): change background color (#518)

Co-authored-by: Dmitriy Potychkin <dmitriy.traceable.ai>
Co-authored-by: Aaron Steinfeld <[email protected]>

Author: DmitiryPotychkin

projects/components/src/header/application/application-header.component.scss

@@ -5,7 +5,7 @@
   width: 100%;
   // Height set from config
   display: flex;
-  background: $blue-9;
+  background: $gray-7;
   padding: 12px 0;
   color: white;