It's a brighter deeper yellow than the picture so it very closely approximates the Anthropologie bag color.
Here's a pattern that's easily adaptable, Journey Handbag pattern by Mary Jo Hiney Designs:
Next up: yellow fabric to peek out from behind the eyelets, a lining fabric, either a very thin leather or faux leather, and the hardware. Oh, the hardware. I struggle with finding great hardware. But find it, I will. I have brown leather in the stash but it's thicker and I'd rather not wrestle with it.
Track the progress to come ...