Zippers are named for the closest Kona quilting cotton solid colour that matches, but colours may look different in real life from what they look like on cellphone screens and computer monitors. Here is a description of each colour to help visualize what they look like in person:
Espresso - a very dark brown, like a café mocha
Earth - a pale milk chocolate brown
Curry - a light yellow brown. It would also match Kona Mustard 1240 and
School Bus - a bright orange that would also match with the new Kona Nacho Cheese colour code (Kona has some very amusing names!)
Clementine - a pale bright orange. Would also match with Kona Orange 1265, and Persimmon 84
Flame - a bright fire-engine red that would also match with the new Kona Chili colour code 1838
Poppy - like the flower, and would also match with Kona Lipstick 1194
Ruby - on the Kona colour chart, Ruby is a dark red that has a hint of brown in it. It would also pair well with Kona Cayenne 355 and Kona Brick 1042.
Pomegranate - a vibrant pinkish red
Geranium - a pinkish purple that is somewhere between fuchsia and magenta
Bright Periwinkle - a purplish blue
Hibiscus - a dark plum purple
Indigo - a dark blue that is almost black. A little darker than Kona Navy 1243
Regal - a purplish blue
Storm - a touch lighter than a navy blue, it would match with Kona Navy 1243
Cadet - similar to a pair of blue jeans and slightly darker than Kona Denim 1452
Blue Jay - a medium blue with a faint hint of purple
Iron - a light blue-grey
Metal - a slightly bluish-grey, or a steel blue
Gotham Grey - a very dark grey almost black and the colour of Batman's outfit.
Black - its... black... and black matches everything. Except Navy because I think that's a faux-pas, just like pink is supposed to clash with red, and you're not supposed to wear white after Labour Day.
O.D. Green - Olive Dark Green, or maybe that's supposed to be Olive Drab Green? It's a greyish olive green which would be great with a camo print.