|The MacKinnon tartan now generally available and
approved by the chief, has altered its appearance over the years,
and returned to the form of the earliest example. The collection of
certified tartans made by the Highland Society of London (c.1816)
includes a specimen signed by the Mackinnon in which the purple stripes
are a light shade of azure, a minor change that is mirrored in other
tartans, notably the Royal Stewart.