Why, yes it is.

When we first started distributing Blue Moon® Belgian White* across the country, we noticed something: lemons. Lots of them. All curiously hanging off the sides of Blue Moon Belgian White*, which is common practice for traditional Belgian Wits that are tart. But Blue Moon® Belgian White* is not tart; it’s slightly sweet. So after a little thinking, Keith suggested garnishing our Belgian White* with an orange slice to heighten the citrus aroma and taste from the Valencia orange peel used to brew the beer. Needless to say, it caught on and Belgian White* was the first American beer that called for an orange.