Making suggested changes and accounting for the NORD theme

src/images/close-button.svg

@@ -0,0 +1 @@
+<svg viewBox="0 0 512 512" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" enable-background="new 0 0 512 512"><path d="M443.6 387.1 312.4 255.4l131.5-130c5.4-5.4 5.4-14.2 0-19.6l-37.4-37.6c-2.6-2.6-6.1-4-9.8-4-3.7 0-7.2 1.5-9.8 4L256 197.8 124.9 68.3c-2.6-2.6-6.1-4-9.8-4-3.7 0-7.2 1.5-9.8 4L68 105.9c-5.4 5.4-5.4 14.2 0 19.6l131.5 130L68.4 387.1c-2.6 2.6-4.1 6.1-4.1 9.8 0 3.7 1.4 7.2 4.1 9.8l37.4 37.6c2.7 2.7 6.2 4.1 9.8 4.1 3.5 0 7.1-1.3 9.8-4.1L256 313.1l130.7 131.1c2.7 2.7 6.2 4.1 9.8 4.1 3.5 0 7.1-1.3 9.8-4.1l37.4-37.6c2.6-2.6 4.1-6.1 4.1-9.8-.1-3.6-1.6-7.1-4.2-9.7z" fill="#ffffff" class="fill-000000"></path></svg>

src/scss/header.scss

@@ -12,7 +12,6 @@
   @include themify($themes) {
     background-color: themed("headerBackgroundColor");
     border-bottom-color: themed("headerBorderColor");
-  }
 
     app-search {
       grid-column-start: 2;
@@ -24,7 +23,9 @@
         height: 15px;
         width: 15px;
         background-repeat: no-repeat;
-      background-image: url("../images/close-white.png");
+        background-image: url("../images/close-button.svg");
+        filter: brightness(themed("svgButtonBrightness"));
+      }
     }
   }
 

src/scss/variables.scss

@@ -93,6 +93,7 @@ $themes: (
     accountSwitcherBackgroundColor: $background-color,
     accountSwitcherTextColor: #ffffff,
     svgSuffix: "-light.svg",
+    svgButtonBrightness: 100,
   ),
   dark: (
     textColor: #ffffff,
@@ -146,6 +147,7 @@ $themes: (
     accountSwitcherBackgroundColor: #2f2f2f,
     accountSwitcherTextColor: #ffffff,
     svgSuffix: "-dark.svg",
+    svgButtonBrightness: 100,
   ),
   nord: (
     textColor: $nord5,
@@ -199,6 +201,7 @@ $themes: (
     accountSwitcherBackgroundColor: $nord0,
     accountSwitcherTextColor: $nord5,
     svgSuffix: "-dark.svg",
+    svgButtonBrightness: 0.5,
   ),
 );