ISTWCMS-5819:css changes for the stpaul to united updates

src/patterns/01-core/props/_colors.scss

@@ -69,10 +69,8 @@
   --stp-2: #e41740;
   --stp-3: #b71233;
   --stp-4: #80001f;
-  --stp-brown: #584528;
-  --stp-green: #879637;
-  --stp-light: #c2cd79;
-  --stp-primary: #879637;
+  --stp-light: #3499CC;
+  --stp-primary: #21698E;
   --ren-1: #ffa5aa;
   --ren-2: #e41740;
   --ren-3: #b71233;

src/patterns/04-components/call-to-action/_call-to-action.scss

@@ -53,7 +53,7 @@
             .uw-cta__text--medium,
             a {
               color: var(--#{$colour}-primary);
-              filter: brightness(0.95);
+              filter: brightness(0.2);
             }
           }