diff --git a/client/index.js b/client/index.js
index 917cc14..f47659a 100644
--- a/client/index.js
+++ b/client/index.js
@@ -47,7 +47,8 @@ function interceptForm (formId) {
         /* Add loading text */
         const submitButton = formElem.querySelector('[type="submit"]')
         const loadingText = document.createElement('span')
-        loadingText.textContent = ' Envoi en cours…'
+        loadingText.classList.add(".contact-mailer-sending");
+        loadingText.textContent = 'Envoi en cours…'
         submitButton.after(loadingText)
         /* XHR */
         fetch(formElem.action, {
diff --git a/client/style.css b/client/style.css
index 4e4cd07..cdeba59 100644
--- a/client/style.css
+++ b/client/style.css
@@ -4,8 +4,7 @@
 
 .contact-mailer-message {
     border: 1px solid;
-    padding: 3px;
-    padding-left: 8px;
+    padding: 2px 8px;
     border-radius: 2px;
     cursor:pointer;
 }
@@ -18,6 +17,22 @@
 
 .contact-mailer-message-success {
     color: white;
-    background-color: #06d6a0;
-    border-color: #06d6a0;
+    background-color: #00B06A;
+    border-color: #00B06A;
 }
+
+.contact-mailer-light-message-error {
+    color: #721c24;
+    background-color: #f8d7da;
+    border-color: #f5c6cb;
+}
+
+.contact-mailer-light-message-success {
+    color: #155724;
+    background-color: #d4edda;
+    border-color: #c3e6cb;
+}
+
+.contact-mailer-sending {
+    padding: 5px 10px;
+}
\ No newline at end of file