Klein Blue, the iconic ultramarine shade created by French artist Yves Klein in the 1950s, has become a true symbol of creativity and boldness in interior design. Intensely luminous and deep, this blue is known for capturing attention and adding a unique artistic touch to any space it adorns. In the Saint-Martin project, this shade was used daringly to transform an entrance hallway into an unforgettable visual experience, seamlessly integrating paint and botanical wallpaper. Let’s explore how Klein Blue can revolutionize your interiors.

Klein Blue Paint with Costaud Rénovation in Paris
What is Klein Blue, and why is it so special?
Klein Blue, also known as "International Klein Blue" (IKB), is an ultramarine shade patented by Yves Klein. He sought to create a color that was not merely a pigment but a true vector of emotion and spirituality. Unlike other shades of blue, Klein Blue possesses an intensity that makes it appear as though it radiates its own light. This shade was popularized in the art world and has since been embraced in fashion, architecture, and interior design.
The power of Klein Blue lies in its ability to draw the eye and evoke emotions. In interior design, it is often used to create a strong visual impact, highlight a specific area of a room, or even establish a calming and meditative atmosphere.
In the Saint-Martin project, this blue serves as the centerpiece of an entrance hallway, transforming a functional space into an artistic statement..

The Saint-Martin Entrance: A Bold and Harmonious Example
The entrance is often overlooked in interior design projects, seen merely as a transition between the exterior and interior. However, in the Saint-Martin project, it becomes a space for bold expression thanks to the use of Klein Blue on the walls. This shade transforms the hallway into an immersive zone, where every detail appears carefully considered.
Klein Blue Paint: Total Immersion
The choice of Klein Blue paint in this space is deliberate. Applied to all the walls, this intense color creates an enveloping, almost theatrical atmosphere. Through this monochromatic immersion, the hallway invites people to slow down and appreciate every element within it.
To prevent the intensity from becoming overwhelming, Klein Blue is balanced with contrasting elements, such as a matte black ceiling and brass accents in the light fixtures. This creates a subtle equilibrium between modernity and timeless elegance.
Botanical Wallpaper: A Dialogue Between Colors and Textures
The addition of botanical wallpaper on certain hallway walls enhances the artistic and organic dimension of the space. With leaf patterns and textures in green and black tones, this wallpaper creates a fascinating dialogue with the surrounding Klein Blue. This subtle contrast energizes the space while maintaining a cohesive color palette.
The choice of botanical motifs also establishes a connection to nature, bringing a soothing and balanced aspect to a space marked by boldness. The combination of Klein Blue paint and textured wallpaper is a perfect example of the harmony that can be achieved by blending opposing elements: the vibrant depth of blue with the tactile richness of organic designs.
Details That Enhance the Design
Sculptural Lighting
Lighting plays a crucial role in showcasing Klein Blue in this space. Sculptural pendant lights, with their organic and modern shapes, cast delicate shadows on the blue walls, accentuating the texture and depth of the paint. These carefully chosen fixtures add a contemporary touch and an extra artistic dimension to the space.
Chevron Parquet Flooring
To anchor the space in timeless elegance, the original chevron parquet flooring was preserved. Its warm, natural tone harmonizes beautifully with the cool blue walls, adding a sense of comfort and balance. This combination of colors and textures gives the hallway a sophisticated yet welcoming feel.
Integrated Functional Details
Beyond aesthetics, the Saint-Martin entrance remains highly functional. Built-in storage, painted in the same Klein Blue as the walls, seamlessly blends into the space, providing discreet storage solutions. This integration enhances the minimalist look while maximizing the usability of the hallway.
Why Incorporate Klein Blue into Your Home?
Using Klein Blue in interior design may seem bold, but it offers numerous aesthetic and emotional benefits:
A Strong Visual Impact: This shade is ideal for creating a focal point in a room or enhancing an often-overlooked space, such as an entrance or hallway.
A Soothing Ambiance: Despite its intensity, blue is naturally calming, making it perfect for fostering a serene and focused atmosphere.
Surprising Versatility: While Klein Blue is highly distinctive, it pairs beautifully with a wide range of styles, from classic interiors to contemporary spaces. It also works well with natural materials such as wood, marble, or metal.
A Connection to Art: By incorporating this shade, you pay homage to Yves Klein’s artistic legacy and add a cultural dimension to your home.
Tips for Using Klein Blue in Your Home
If you’re drawn to Klein Blue but hesitant to integrate it into your decor, here are some practical tips:
Start Small: Try this color in a limited space, such as a hallway, alcove, or accent wall, before committing to an entire room.
Pair It with Textures: Combine it with natural materials or patterns, like botanical wallpaper, to soften its impact and create visual harmony.
Play with Lighting: Klein Blue reacts beautifully to light. Use fixtures that highlight its nuances and add a sculptural dimension to the space.
Introduce Contrasts: Pair it with neutral tones like white or black or with warm materials like wood to balance the intensity of the color.
The Saint-Martin project brilliantly demonstrates how a bold shade like Klein Blue can transform a functional space into an immersive work of art. By combining this vibrant paint with complementary elements such as botanical wallpaper, designer lighting, and warm parquet flooring, this entrance hallway becomes more than just a passageway—it embodies an artistic and refined vision of interior design.
Embracing Klein Blue in your home means choosing a decor that stands out. Whether you’re looking to reinvent a space or simply add an artistic touch, this iconic color offers endless potential for expressing your creativity. So, are you ready to dive into the blue?
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