Use new theme red shade as the danger red; tone down compile log alerts.

services/web/public/stylesheets/app/editor/pdf.less

@@ -207,16 +207,25 @@
 			}
 		}
 
-		&.alert-danger:hover {
-			background-color: darken(@alert-danger-bg, 5%);
+		&.alert-danger {
+			background-color: tint(@alert-danger-bg, 15%);
+			&:hover {
+				background-color: @alert-danger-bg;
+			}
 		}
 
-		&.alert-warning:hover {
-			background-color: darken(@alert-warning-bg, 5%);
+		&.alert-warning {
+			background-color: tint(@alert-warning-bg, 15%);
+			&:hover {
+				background-color: @alert-warning-bg;
+			}
 		}
 
-		&.alert-info:hover {
-			background-color: darken(@alert-info-bg, 5%);
+		&.alert-info {
+			background-color: tint(@alert-info-bg, 15%);
+			&:hover {
+				background-color: @alert-info-bg;
+			}
 		}
 
 	}

services/web/public/stylesheets/core/ol-variables.less

@@ -249,7 +249,7 @@
 @brand-success:         @green;
 @brand-info:            @ol-blue;
 @brand-warning:         @orange;
-@brand-danger:          #E03A06;
+@brand-danger:          @ol-red;
 
 @editor-loading-logo-padding-top: 115.44%;
 @editor-loading-logo-background-url: url(/img/ol-brand/overleaf-o-grey.svg);