Most kilts are tartan so they are multi-coloured.
The cloth that Scottish people wear for their kilts is called tartan. It is a patterned woolen fabric with colorful stripes and checks that is traditionally associated with Scottish culture and kilts.
Kilts
Kilts.
Tartan
Scottish
Yes, they originated in Scotland and are worn both by men and women.
They wore kilts and tarps.
They are known as kilts.
Kilts are Gaelic in origin, and Gaels populated both of those modern-day regions. So both of them have kilts, and they get them from the same place even if their styles have diverged over time. That said, the oldest records of them are from the Scottish Highlands.
The difference between kilts and skirts is largely cultural. Kilts are worn by men (Scottish usually) and made from heavy wool and cotton. Skirts worn by women and are made of a variety of materials.
Tartan
No Scottish. Although they sure seem Irish, don't they?