When seen individually, many people mistake silk braid buttons for mourning buttons made of hair. Silk braid buttons were often dyed colors, like blue & green. Mourning buttons used a loved ones hair that was its original color. Mourning buttons were special & the hair was often set in gold, where as these silk buttons were set in vegetable ivory.
These brite cut buttons with brass birds were used on a wedding dress in 1886. White wedding dresses became popular in 1840 after Queen Victoria married Prince Albert. Before that, wedding dresses came in many colors.
During the Middle Ages & Renaissance, colors had symbolic meanings and wedding dresses were made in a range of colors. Blue was a popular choice as it represented chastity but brides also choose colors like green, red & yellow.