Sienna Naturals: the story of Issa Rae & Hannah Diop's clean beauty brand

Sienna Naturals: The Story of a Brand That Dared to Speak the Truth About Textured Hair

Some brands are born from a marketing opportunity. And then there are those born from a deep frustration experienced in one's own bathroom. Sienna Naturals clearly belongs to the latter category. Behind the sleek bottles and the "clean" promise lies a story spanning over ten years: that of a woman who couldn't find the product she was looking for, and decided to create it herself. At Colorful Black, it's precisely this kind of story—sincere, demanding, rooted in reality—that makes us want to bring a brand into our selection.

2012: It all begins with a disturbing observation

The story of Sienna Naturals starts with Hannah Diop. Raised with an environmentally conscious ethic, she quickly encountered a barrier that many people with textured hair experience: the inability to find hair care that truly works without compromising on health.

The realization was stark. At the time—and still largely today—the majority of products marketed for textured hair rely on aggressive ingredients that promise wonders without delivering, and which can compromise the health of the hair and scalp in the long term.

In 2012, Hannah decided to act. Not by launching a product hastily, but by tackling the problem at its root. This led to:

• Thousands of hours of research and testing
• Rigorous evaluation of ingredients, one by one
• Hundreds of formula drafts before achieving the desired result

From this tireless work, Sienna Naturals was born: a brand conceived not to follow a trend, but to fill a real void in the market.

The arrival of Issa Rae: from tester #1 to co-founder

For over eight years, Hannah Diop developed her brand. And throughout this journey, one person played a very special role: her sister-in-law, Issa Rae. Actress, screenwriter, and producer (notably revealed by the series Insecure), Issa is also—and above all, in this story—Hannah's favorite product tester. The most loyal, but also the most demanding.

It was only after these eight years of observation and use that Issa Rae officially joined the adventure as a co-founder. A detail that speaks volumes: she didn't just put her name on a brand. She experienced the products, tested them, before committing. Her contribution is also that of a figure who transformed how the world perceives the beauty and versatility of textured hair.

Today, the duo embodies a clear division of roles:

• Hannah Diop — Co-founder & CEO. A businesswoman with an MBA, she is the formulating brain and the thread that connects the entire edifice.
• Issa Rae — Co-founder & creative visionary. The most uncompromising tester, guaranteeing the high standards for product performance.

Rooted™ Technology: Where Science Meets Nature

If Sienna Naturals delivers on its promises, it's thanks to its technological DNA: Rooted™ technology. This is what distinguishes the brand from simple "natural cosmetics" and explains why its formulas truly perform.

The principle? Drawing inspiration from ancestral hair rituals and responsibly sourced natural ingredients—botanical extracts, vegetable oils, vegan proteins—then elevating them through molecular chemistry, for action at the fiber and scalp level. In other words: the power of nature, amplified by the precision of science.

Specifically, this technology allows for:

• Deep hydration for textured hair
• Strengthening the hair fiber and reducing breakage
• Defining and revitalizing curls
• Supporting long-term scalp and follicle health

A clean brand… and clinically proven

The word "clean" is overused today. At Sienna Naturals, it comes with proof. The brand is indeed the first dermatologist-tested and approved hair care line specifically designed for textured hair.

Behind this label lies a serious protocol: each product is tested on over 50 people for several weeks, under the supervision of certified dermatologists and registered nurses, before being deemed non-irritating and non-sensitizing. Formula development relies on leading scientists, such as cosmetic science researcher Lola Agidigbi, who co-developed many formulas alongside Hannah.

And regarding composition, the philosophy is uncompromising. The formulas are:

• Vegan and cruelty-free
• Free from harsh sulfates, parabens, silicones, phthalates, petroleum, mineral oil, formaldehyde, and synthetic fragrances
• Responsibly sourced, without unnecessary fillers
• Designed with an eco-responsible approach (recyclable packaging)

Added to this is a dimension that is close to our hearts: Sienna Naturals is a Black-owned brand, driven by a clear mission—to rewrite the rules of textured hair care.

"The Realist": a brand that speaks truthfully

What makes Sienna Naturals endearing, beyond the technology, is its stance. The brand embraces a philosophy that it summarizes with one word: being realistic.

Sienna starts from a simple principle: natural hair is a journey. There are ups, downs, and off days. The brand doesn't try to sugarcoat this journey with disconnected Instagram aesthetics or unrealistic promises. It prefers to loudly name the silent difficulties… and celebrate victories more loudly than anyone else.

This vision is based on a strong conviction: your best hair starts with a healthy scalp. And most importantly, you should never have to choose between the safety of a formula and style. Beauty without compromise: that is the promise.

No matter how you wear your textured hair—curly, coily, straightened, relaxed, braided, locs, wigs, or weaves—you deserve to express yourself with confidence.

Why we brought Sienna Naturals to Colorful Black

At Colorful Black, we select brands with a simple requirement: do they truly deliver on their promises for textured hair? Sienna Naturals ticks all the boxes—an authentic story, clinically proven technology, and a clean ethic that aligns with our values.

It's also a brand still difficult to find in France. By offering it in our Parisian store and on our e-shop, we want to provide our community with easy access to the best in clean hair care—without having to order from across the globe.

Want to discover the product range logic and know which products to choose based on your needs? We have dedicated a full article to the Sienna Naturals routine. And to see all available products, head to our Sienna Naturals collection.