Yes,as I remember it pink shirts were quite popular in the late 60s,I don't just mean button downs but ordinary shirts.
Spear collars,I think that we called them flyaways,did they get a bit popular again for a short time between button downs and round collars ? or was it after round collars 73/74 ?.
I got to say I am not sure if I would wear a pink shirt now after thinking about it,probably not yellow either.
I have a couple yellow and pink oxford buttondowns, very nice with the right tie/jacket combo.
I also wear the yellow one with a dark green v-neck and charcoal strides with black longwings, very clean look.