IT is rare for fabric makers to get much buzz, let alone credit in fashion bibles like Vogue and Lucky magazines. But Audrey Louise Reynolds, a 27-year-old self-taught designer who lives in Brooklyn, has emerged as the fashion world’s artisanal fabric dyer. Her earthy, one-of-a-kind dyes, which she makes in small batches in her backyard in Red Hook, Brooklyn, using only natural and organic ingredients like bark and squid ink, have earned her a loyal following. Avant-garde designers like Rogan, Loomstate, No. 6, Bodkin and Wendy Nichol commission her to create unique colors and patterns. For Rogan, Ms. Reynolds suffused a floor-length silk dress using five types of gray dye, including one made from recycled rubber tires that she dip-dyed, splattered and over-dyed to create deep waves of color. For Wendy Nichol, she soaked the designer’s leather tote bags, creating a light wash that wrinkled the leather. She accentuated the look with hand-painted accents and used ...