As a wig is the big part of hiding my characters gender I decided to do a little more research into powdered wigs in the Georgian Era, I only knew a tiny bit about wigs of this time period, thankfully Wikipedia saved the day!
"In the 18th century, men's wigs were powdered in order to give them
their distinctive white or off-white color. Women in the 18th century
did not wear wigs, but wore a coiffure supplemented by artificial hair
or hair from other sources. Women mainly powdered their hair grey, or
blue-ish grey, and from the 1770s onwards never bright white like men.
Wig powder was made from finely ground starch that was scented with orange flower, lavender, or orris root.
Wig powder was occasionally colored violet, blue, pink or yellow, but
was most often used as off-white. Powdered wigs (men) and powdered
natural hair with supplemental hairpieces (women) became an essential
for full dress occasions and continued in use until almost the end of
the 18th century. The elaborate form of wigs worn at the coronation of George III in 1761 was lampooned by William Hogarth in his engraving Five Orders of Periwigs.
Powdering wigs and extensions were messy and inconvenient, and the
development of the naturally white or off-white powderless wig (made of
horsehair) for men is no doubt what has made the retention of wigs in
everyday court dress
a practical possibility. By the 1780s, young men were setting a fashion
trend by lightly powdering their natural hair, as women had already
done from the 1770s onwards. After 1790, both wigs and powder were
reserved for older, more conservative men, and were in use by ladies
being presented at court. After 1790 English women seldom powdered their
hair. In 1795, the British government levied a tax on hair powder of one guinea per year. This tax effectively caused the demise of both the fashion for wigs and powder. Granville Leveson-Gower, in Paris during the winter of 1796, noted "The word citoyen
seemed but very little in use, and hair powder being very common, the
appearance of the people was less democratic than in England." Among women in the French court of Versailles
in the mid-to-late 18th century, large, elaborate and often themed wigs
(such as the stereotypical "boat poufs") were in vogue for women. These
combed-up hair extensions were often very heavy, weighted down with
pomades, powders, and other ornamentation. In the late 18th century
these coiffures (along with many other indulgences in court life) became
symbolic of the decadence of the French nobility, and for that reason
quickly became out of fashion from the beginning of the French Revolution in 1789.
During the 18th century, men's wigs became smaller and more formal
with several professions adopting them as part of their official
costumes. This tradition survives in a few legal systems. They are
routinely worn in various countries of the Commonwealth. Until 1823, bishops of the Church of England and Church of Ireland
wore ceremonial wigs."
I wanted to toy with the idea of having a coloured wig to confuse people about my characters gender even more, and reading that it was a thing to 'powder colour' wigs gives me a little bit more freedom with the colour and the variety of the wig.