They certainly are, red was HUGE back in my Pony Club Novice to Prelim era - but now, no one has it. Burgundy was very popular as well, and I can barely find that and rarely see it on horses at HT's.
I remember my friend was Red and White. She had a red pad, red electical tape on her buckles, red and white mixed petal boots, a maple leaf clipped on her horses butt and a red over girth.
Her brother was black and green, with the same matching concept and I was Black and White with white accents.
We were smokin' back in our Pony Club days.