fix(web): names of colour variables

Author: Manuel Proß

web/src/styles/globals.scss

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