Create style.css

style.css

@@ -0,0 +1,13 @@
+body {
+    background-color: black;
+}
+
+.btn-primary {
+    background-color: purple;
+    border-color: purple;
+}
+
+.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
+    background-color: #800080;
+    border-color: #800080;
+}