The base color, because black & white is what I do (journalism) and how I think.
In addition, each horse has a color for personal items: feed buckets, grooming slips, brush boxes, etc.
Previous Horse’s competition color.
Previous Horse’s retirement color. It’s good to be the king emperor.
Process note: These are no longer done in haste. Instead, they reflect a refreshing element of spontaneity.
Virtual Brush Box 
Seize the day, indeed. 😉
Everything i got for Toby (previous dog) was some shade of blue, although a lot turned out more a dark teal color. Eowyn (current dog) has hot pink as her color, because, being black and white it really shows up, and because she’s such a diva. Angel when we’re out and she’s working, diva at home. sometimes have to settle for a different shade of pink. She’s between sizes so hard to buy for.
With Priney (Prin-ee) and Chief, everything was as blue and brown as i could make it. I had a blue/brown striped shirt that was perfect for cross country. My helmet, back in the days of “mushroom head” (that thing protected me more than once, even just out for a quiet trail ride) had a cover that was brown with a blue stripe. I still have both their halters. I didn’t always do well, but i enjoyed bopping around – especially since Katherine taught Priney that cross-country was fun.