I dunno.... I am normally all in favor of lavenders, but I looked at the description and image of ECLIPSE SPELL, and between the two, I can't help but think that "dusky" translates to "muddy".
Maybe I'm just being influenced by my daylily experiences, where "lavenders" were often muddy mauves, but...
(And it's not like I have any business actually ADDING any more irises, beyond one I hope to get from a friend this year...
)