diff --git a/addons/mail/static/src/components/discuss/discuss.xml b/addons/mail/static/src/components/discuss/discuss.xml
index 68796d7aca2..fe2aeb9f4ec 100644
--- a/addons/mail/static/src/components/discuss/discuss.xml
+++ b/addons/mail/static/src/components/discuss/discuss.xml
@@ -25,7 +25,7 @@
             <DiscussMobileMailboxSelection className="'o_Discuss_mobileMailboxSelection w-100 border-bottom'" record="discussView"/>
         </t>
         <t t-if="discussView.mobileAddItemHeaderAutocompleteInputView">
-            <div class="o_Discuss_mobileAddItemHeader d-flex justify-content-center w-100 p-3 border-bottom">
+            <div class="o_Discuss_mobileAddItemHeader d-flex justify-content-center w-100 p-3 border-bottom bg-light">
                 <AutocompleteInput
                     className="'o_Discuss_mobileAddItemHeaderInput flex-grow-1 mb-3 p-2 rounded border'"
                     record="discussView.mobileAddItemHeaderAutocompleteInputView"
@@ -44,18 +44,18 @@
             />
         </t>
         <t t-if="!discussView.discuss.thread and (!messaging.device.isSmall or discussView.discuss.activeMobileNavbarTabId === 'mailbox')">
-            <div class="o_Discuss_noThread d-flex flex-grow-1 align-items-center justify-content-center w-100">
-                No conversation selected.
+            <div class="o_Discuss_noThread d-flex flex-grow-1 align-items-center justify-content-center w-100 bg-white">
+                <h4 class="text-muted"><b><i>No conversation selected.</i></b></h4>
             </div>
         </t>
         <t t-if="messaging.device.isSmall and discussView.discuss.activeMobileNavbarTabId !== 'mailbox'">
             <t t-if="discussView.discuss.activeMobileNavbarTabId === 'chat'">
-                <button class="o_Discuss_mobileNewChatButton btn btn-secondary" t-on-click="discussView.onClickMobileNewChatButton">
+                <button class="o_Discuss_mobileNewChatButton w-100 p-2 btn btn-secondary border-bottom bg-light" t-on-click="discussView.onClickMobileNewChatButton">
                     Start a conversation
                 </button>
             </t>
             <t t-if="discussView.discuss.activeMobileNavbarTabId === 'channel'">
-                <button class="o_Discuss_mobileNewChannelButton btn btn-secondary" t-on-click="discussView.onClickMobileNewChannelButton">
+                <button class="o_Discuss_mobileNewChannelButton w-100 p-2 btn btn-secondary border-bottom bg-light" t-on-click="discussView.onClickMobileNewChannelButton">
                     New Channel
                 </button>
             </t>