Boutonnière
A boutonnière or buttonhole is a floral decoration, typically a single flower or bud, worn on the lapel of a tuxedo or suit jacket.
Read on WikipediaPale blue forget-me-not, the kind of flower pinned to a wedding lapel.
Boutonniere is a pastel blue.
It can be described as pastel, soft, light and unsaturated.
Set in black, because black reads best on it.
A boutonnière or buttonhole is a floral decoration, typically a single flower or bud, worn on the lapel of a tuxedo or suit jacket.
Read on WikipediaNoun