feat: update colors for v4 (#10660)

Porting changes from https://github.com/chatwoot/chatwoot/pull/10552

---------

Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Vishnu Narayanan <vishnu@chatwoot.com>
Co-authored-by: Sojan <sojan@pepalo.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>
Co-authored-by: Pranav <pranavrajs@gmail.com>

app/javascript/dashboard/components/ChatList.vue

@@ -782,7 +782,7 @@ watch(conversationFilters, (newVal, oldVal) => {
 
 <template>
   <div
-    class="flex flex-col flex-shrink-0 conversations-list-wrap"
+    class="flex flex-col flex-shrink-0 bg-n-solid-1 conversations-list-wrap"
     :class="[
       { hidden: !showConversationList },
       isOnExpandedLayout ? 'basis-full' : 'w-[360px] 2xl:w-[420px]',