Well, that's not OBL, it's the one we moved to Spiritual Corridor.
This is a true depiction of OBL. If your other photo in that entry is never this color (I assumed it was lighter due to a flash used) then that photo is incorrect too. It has a slightly darker band around the throat.
Notice the older style shape of the petals and sepals. It's a 1974 intro.
Spiritual Corridor is a light lavender, is a 1992 intro, and has wider petals and that wider watermark,
Watermark on daylilies: visualize water seeping out from center, drying, and leaving a watermark. It was something first developed by Bill Munson the hybridizer I believe. It became his signature pattern.
https://www.daylilies.org/ahs_...