I think that is a pretty typical color for many/most hybrids that are 50% kovachii and between 33-50% besseae. Remember, dalessandroi is officially besseae var. dalessandroi.
I recently bloomed (kovachii x dalessandroi), which is Peruflora's Cirila Alca, back-crossed to besseae, and it had virtually this same color. We named this cross Phrag Yoko W. Fischer. I have seen a number of Fritz Schomburgs (kovachii x besseae) that had this same color and shape. Obviously, Fritz Schomburg and Peruflora's Cirila Alca are about as closely related as you can get.
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