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Provider and controller
Bobby Zuber
NIE: Y4291153B
Calle Vista Valle 34, Villa 4
38768 El Paso
Santa Cruz de Tenerife, Spain
Email: [email protected]
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Terms
Personal data: information that can be used to directly or indirectly identify a person
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Tracker: Technologies such as cookies, pixels, scripts or fingerprinting.
Cookie: Small text file that is stored in the browser.
Controller: The person or body that decides on the purposes and means of data processing.
Black Friday week: Get our API at a special price. Get it now. Get more detailed color conversion results - perfect for web projects, plugins, internal tools or SaaS applications. Valid from 2025-11-24 up to and including 2025-11-30 (23:59 CET)
First enter the color code to find the conversion and the best matching colors. After that, you can create palettes by clicking on and download color samples.
If you want to convert a professional façade or interior paint from the Sto-Color-System® into a standardized industrial tone, you can convert Sto to RAL®. qConv analyzes the LAB color value of the Sto shade and compares it with the standardized RAL Classic and RAL Design palettes to find the visually closest match.
Converting Sto-Color-System to RAL is especially useful for architects, planners, craftsmen, and construction companies who need to translate Sto colors into technical RAL specifications or industrial surface coatings. qConv ensures your color concept can be implemented both aesthetically and technically with precision.
Since Sto colors are design-oriented and RAL colors are industrially standardized, the conversion from Sto to RAL may show minor differences in temperature or saturation. However, qConv provides a colorimetrically accurate approximation including Delta-E value, LAB comparison, and visual preview.
How does the conversion work?
During the conversion from Sto to RAL, qConv compares the LAB values of your chosen Sto color with the profiles of the RAL databases. It calculates the color differences (Delta-E) and identifies the RAL tone with the smallest deviation. The result includes the corresponding RAL color code and name, e.g. RAL 9010 Pure White or RAL 1019 Grey Beige.
This Sto-to-RAL color conversion allows you to reproduce the color effect of a Sto tone on industrial materials such as metal, plastic, or wood. qConv takes into account lightness (L*), hue (a*, b*), and perceived gloss level.
This makes the conversion an essential tool for precise color communication between manufacturers, architects, and contractors — particularly useful for specifications and quality control.
Example & application
Example: The Sto color Sto 32035 (a light cream white) approximately matches RAL 9001 Cream White. qConv automatically displays this conversion from Sto to RAL and suggests harmonious or similar RAL alternatives for different materials or finishes.
Converting Sto-Color-System to RAL is ideal for façade design, interior projects, and architectural planning where Sto colors need to comply with international RAL standards. This ensures consistency and reproducibility across materials and manufacturers.
Tip: Use the Sto-to-RAL conversion when coordinating architectural colors with technical coatings. qConv supports your planning with precise LAB data, visual comparisons, and directly usable color codes.
* Note:
qConv.com searches for the next matching color from the selected color palette. In most cases, there will be minimal or apparent color differences because there is not an exact match for every color.
The StoColor System is the professional color system of the German manufacturer Sto, designed specifically for architecture, façade design, and interior spaces. It is based on scientific principles of color perception and was developed to ensure reliable color planning for buildings. With over 800 shades, the StoColor System offers a well-balanced spectrum organized into 24 systematically structured color families.
Each family includes harmonious gradations of hue, lightness, and saturation, allowing targeted color combinations and balance. All tones are coordinated with the Sto product range, ensuring precise color reproduction across paints, plasters, and coatings. The system provides architects, planners, and designers with maximum creative flexibility and consistent color reliability.
Usage
The StoColor System is primarily used in façade and interior architecture. It provides a practical foundation for color design across buildings, interiors, and material surfaces. Its clear structure makes it easy to create harmonious color concepts for entire projects — from base layers and coatings to accent areas. The colors are UV-stable, weather-resistant, and designed for long-term color fidelity.
Many Sto products — such as StoColor Lotusan®, StoColor Dryonic®, and StoColor Silco — are aligned with the StoColor System. Using digital tools like qConv, StoColor values can be easily converted into systems such as RAL, NCS, or Sikkens to analyze color combinations and maintain consistency across projects.
Tips for Designers & Agencies
The StoColor System is ideal if you want to develop architecturally coordinated and material-appropriate color schemes. When planning, consider the influence of light and surface texture — matte and glossy finishes can significantly change the color’s appearance. The structured division into color families helps you work precisely with nuances and contrasts.
With qConv, you can accurately compare StoColor shades, find complementary colors, and simulate gradients digitally. This allows you to confidently implement complex color concepts — from the first design sketch to the finished building application.
The RAL® color system is an internationally recognized standard for defining and communicating colors. Originating in Germany in 1927, RAL established a consistent catalog that assigns each color a unique four-digit number, such as “RAL 3020 Traffic Red.”
The classic RAL® palette includes 213 standardized colors in the RAL Classic collection. Each tone is precisely defined to ensure color consistency across materials, manufacturers, and applications. Beyond RAL Classic, there are also the RAL Design System Plus and RAL Effect lines, offering more than 2,500 colors for architecture, product design, and industrial coatings.
Usage
RAL® is widely used in architecture, construction, automotive, and industrial manufacturing to define exact color specifications for paints, coatings, and materials. It is the standard reference for designers, engineers, and production companies that require accurate and repeatable color matching worldwide.
Designers often use RAL colors when creating brand elements, interiors, and exterior coatings. The universal numbering system ensures that a chosen RAL color looks the same across all production environments.
Tips for Designers & Engineers
When selecting RAL colors, consider the surface finish — glossy, matte, or textured coatings can affect perception. Always compare samples under realistic lighting conditions. The RAL Design System Plus offers finer gradations for designers who need nuanced hues for product and interior applications.
With qConv, you can convert RAL® colors to HEX, RGB, CMYK, Pantone® or HKS® formats, making it easy to align digital and physical color specifications within your design process.