Swords and Spurs
The Wild Geese colors are various shades of tan and brown, with highlights representing each squadron in the regiment.
Per Mercenaries Supplemental 2, page 63.
Highlander, Mercenaries Supplemental 2 (color plates)
Their insignia is a stylized bronze goose with its wings extended forward over bronze-trimmed black background. Per FM: Mercenaries Supplemental II, page 64.