Black is not Delia's colour.
Yellows, purples; bright colours that match her sunny personality. The pastels of her nurse's uniform. Seeing Delia head-to-toe in black adds to the surrealism that has cloaked Nonnatus ever since Sister Mary Cynthia knocked on the door to her and Trixie's room to tearfully break news none of them expected.
There has been no rest for the wicked – running around Poplar collecting bottles of Distaval has left little time for reflection, but since this morning, everything has rather stood still.
Delia has been keeping a respectful distance, quietly mourning a woman she never got the chance to really know. Even so, Delia is far less acquainted with death than Patsy, and her empathic nature means she shares the pain alongside her newfound sisters. On the day of the funeral, she watches Patsy across the parlour, waiting by the door for Patsy to be ready (she's never ready), as she touches Sister Evangelina's cold hand one last time, thanking her for everything.
As the procession begins, slowly trundling past an impenetrable wall of people, the entirety of Poplar out to show their respect, Patsy reverently takes Delia's arm in support.