If you watch Lady Danbury closely in both timelines, she mostly wears two colors.
First is gold, which the young Lady Danbury (Arsema Thomas) starts off wearing because it is her husband’s favorite. Meanwhile, the older Lady Danbury (Adjoa Andoh) wears her signature dark purple.
As the series progresses, the young Lady Danbury starts to wear more purple as she finds her individuality, while the older Lady Danbury goes back to gold as she reminisces about her late husband.
For example, young Lady Danbury is seen in purple in the episode three scene when she tells Coral about Lord Danbury’s death. Meanwhile, the older Lady Danbury is wearing a black-and-gold dress when she tells Violet Bridgerton that she only found love after her husband died.
Costume designer Lyn Paolo said: “By the end of our story, our ‘Bridgerton’ Lady Danbury is wearing gold again because she’s figured out that none of it matters, and she can be happy without a man and still wear this color. Basically, she’s saying, ‘I can do whatever I want.'”
“There is this transition with Agatha, from these colors that her husband liked into the colors that she likes, and there’s this segue with Lady Danbury where the reverse happens, because she’s lived this great life. She chose not to marry again. She chose not to bear more children for someone else. She chose to be an independent woman and all of a sudden, she’s wearing the colors that Agatha wore and hated — but now she’s strong enough to go, ‘I can wear that. It’s fine.'”