diff --git a/res/themes/dharma/css/_dharma.scss b/res/themes/dharma/css/_dharma.scss
index dac6f45e65..ea6b24dec4 100644
--- a/res/themes/dharma/css/_dharma.scss
+++ b/res/themes/dharma/css/_dharma.scss
@@ -30,6 +30,7 @@ $focus-brightness: 125%;
 $warning-color: #ff0064;
 // background colour for warnings
 $warning-bg-color: #DF2A8B;
+$info-bg-color: #2A9EDF;
 $mention-user-pill-bg-color: #ff0064;
 $other-user-pill-bg-color: rgba(0, 0, 0, 0.1);
 
@@ -184,6 +185,10 @@ $progressbar-color: #000;
 @define-mixin mx_DialogButton_hover {
 }
 
+@define-mixin mx_DialogButton_danger {
+    background-color: $warning-color;
+}
+
 @define-mixin mx_DialogButton_small {
     @mixin mx_DialogButton;
     font-size: 15px;