Here is what the breed description says about the colours:
"A range of duns-mouse, yellow, grey, cream. Also grey, brown, black and occasionally bay and liver chestnut with silver mane and tail. Many ponies have a dorsal stripe and some show zebra markings on legs. Shoulder stripe often present. A small star is acceptable but other white markings are discouraged. Foal coat often changes and many ponies change colour gradually as they grow older, especially those with grey hairs interspersed with the original colour. Others show a slight seasonal change in colour between winter and summer coats. Broken colours are not allowed"
Dark Highland pony
Bay Highland pony
White Highland pony
I will be putting up more photos of different Highlands in different colours from our other photographing trip in Dalwhinnie, so be sure to check back soon.
White pony in black and white
White pony in sepia
Many of these and other images are available to purchase in my Etsy shop