I believe you’re talking about “twilight”, as it’s called by Bulbapedia.
Morning tints everything a pale blue color, changing from dark blue of night into bright blue of daytime. Morning lasts from 4:00 a.m. to 9:59 a.m. (04:00 - 9:59).
Everything takes on its natural color during the day. Day lasts from 10:00 a.m. to 7:59 p.m. (10:00 - 19:59), with twilight lasting from around 5:00 p.m. (17:00) until night sets in.
Those times, according to Bulbapedia, are the times that Eevee can evolve it Espeon (morning and day).
Basically twilight counts as day so yes.
Hope this helps! :)