diff --git a/controllers/web/product.py b/controllers/web/product.py
index 25f1800..5a3bec5 100644
--- a/controllers/web/product.py
+++ b/controllers/web/product.py
@@ -50,7 +50,10 @@ def category(category: str):
 
     # No Products visible
     if products is None:
-        flash(f"No Products available. Try expanding your search criteria.")
+        flash(
+            f"No Products available. Try expanding your search criteria.",
+            "warning"
+        )
 
     return render_template(
         'index.html',
@@ -68,7 +71,7 @@ def id(id: int):
 
     # Check that a valid product was returned
     if product is None:
-        flash(f"No Product available with id {id}")
+        flash(f"No Product available with id {id}", "warning")
         return redirect("/")
 
     print(product.name)
@@ -86,7 +89,7 @@ def display_add_product():
 
     # User needs to be logged in as a seller to view this page
     if not is_role("Seller"):
-        flash("You must be logged in as a seller to view this page!")
+        flash("You must be logged in as a seller to view this page!", "error")
         return redirect("/")
 
     return render_template('index.html', content='new_product.html')
@@ -101,7 +104,7 @@ def add_product():
 
     # User needs to be logged in as a seller to view this page
     if not is_role("Seller"):
-        flash("You must be logged in as a seller to view this page!")
+        flash("You must be logged in as a seller to view this page!", "error")
         return redirect("/")
 
     file = request.files.get('image')
@@ -132,14 +135,14 @@ def update_product(id: int):
 
     # User needs to be logged in as a seller to view this page
     if not is_role("Seller"):
-        flash("You must be logged in as a seller to view this page!")
+        flash("You must be logged in as a seller to view this page!", "error")
         return redirect("/")
 
     db = ProductController()
     product = db.read_id(id)
 
     if product.sellerID != user_id:
-        flash("This product does not belong to you!")
+        flash("This product does not belong to you!", "error")
         return redirect("/ownproducts")
 
     # Save new image file
@@ -158,7 +161,7 @@ def update_product(id: int):
     product.quantityAvailable = request.form.get('quantity')
 
     db.update(product)
-    flash("Product successfully updated")
+    flash("Product successfully updated", 'notice')
     return redirect(f"/products/{product.id}")
 
 
@@ -169,14 +172,14 @@ def display_own_products():
 
     # User must be logged in as seller to view page
     if not is_role("Seller"):
-        flash("You must be logged in as a seller to view this page!")
+        flash("You must be logged in as a seller to view this page!", "error")
         return redirect("/")
 
     db = ProductController()
     products = db.read_user(user_id)
 
     if products is None:
-        flash("You don't currently have any products for sale.")
+        flash("You don't currently have any products for sale.", "info")
 
     return render_template(
         'index.html',
diff --git a/controllers/web/user.py b/controllers/web/user.py
index 7b15240..60bd316 100644
--- a/controllers/web/user.py
+++ b/controllers/web/user.py
@@ -31,13 +31,13 @@ def login():
     # No user found
     if user is None:
         error = "No user found with the username " + request.form['username']
-        flash(error)
+        flash(error, 'warning')
         return redirect("/login")
 
     # Incorrect Password
     if sha512(request.form['password'].encode()).hexdigest() != user.password:
         error = "Incorrect Password"
-        flash(error)
+        flash(error, 'warning')
         return redirect("/login")
 
     session['user_id'] = user.id
@@ -59,7 +59,7 @@ def signup():
     # User already exists
     if database.read(request.form['username']) is not None:
         error = "User, " + request.form['username'] + " already exists"
-        flash(error)
+        flash(error, 'warning')
         return redirect("/signup")
 
     # Signup as Seller or Customer
diff --git a/templates/header.html b/templates/header.html
index 850d9dd..d6b0407 100644
--- a/templates/header.html
+++ b/templates/header.html
@@ -35,12 +35,12 @@
     </centre>    
 </div>
 
-{% with messages = get_flashed_messages()%}
+{% with messages = get_flashed_messages(with_categories=true)%}
     {% if messages %}
-        {% for message in messages %}
+        {% for category, message in messages %}
             <label>
                 <input type="checkbox" class="alertCheckbox" autocomplete="off" />
-                <div class="alert error">
+                <div class="alert {{category}}">
                     <span class="alertClose">X</span>
                     <span class="alertText">{{message}}
                         <br class="clear"/></span>