diff --git a/bsdialog4.js b/bsdialog4.js
index 437bd80..454e4b8 100644
--- a/bsdialog4.js
+++ b/bsdialog4.js
@@ -133,7 +133,7 @@ var BSDialog = {
 		a.body = document.getElementsByTagName("body")[0];
 
 		a.addBackdrop();
-		a.addModal(_options.ID, _options.Title, _options.Size);
+		a.addModal(_options.ID, _options.Title, _options.Size, _options.Colour);
 
 		if (_options.URL == null) {
 			await a.UpdateBody(_options.ID, _options.Message);
@@ -263,7 +263,7 @@ var BSDialog = {
 			a.Clear();
 		});
 	},
-	addModal: function (id, title, size) {
+	addModal: function (id, title, size, closeColour) {
 		var a = this;
 
 		// don't allow duplicates
@@ -294,7 +294,7 @@ var BSDialog = {
 
 		html += '      </div>';
 		html += '      <div class="modal-footer">';
-		html += '        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>';
+		html += '        <button type="button" class="btn btn-' + closeColour + '" data-dismiss="modal">Close</button>';
 		html += '      </div>';
 		html += '    </div>';
 		html += '  </div>';