refactor(web): replace rgba colors with corresponding hex code

Author: Manuel Proß

web/src/styles/globals.scss

@@ -5,8 +5,9 @@
 
 :root {
 	--c-primary: #45ff02;
-	--c-gray-1: rgba(199, 199, 198, 25);
-	--c-gray-2: rgba(127, 127, 127, 20);
+	--c-primary-opacity: #45ff0215;
+	--c-gray-1: #c7c7c620;
+	--c-gray-2: #7f7f7f25;
 	--c-gray-3: #cccccc;
 	--c-gray-4: #313131;
 	--c-gray-5: #222222;