Jasper identified himself as orange: [strange-and-random-happenstance.blogspot.com
] I am pretty sure I saw another interview where he confirmed this, but I can't find it any more.
You may want to look again at the chapter "Travel to East Carmine", where some Oranges are described. They alight at Persimmon-on-River. If you have solved the sleuthing competition
and reevaluate which town this may be in the real world, you may come to your own conclusions...