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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.
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.
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.
RGB to HEX
convert from RGB red green blue to #RRGGBB
RGB to CMYK
convert from RGB red green blue to CMYK cyan / magenta / yellow / black
RGB to RAL®
convert from RGB red green blue to RAL®-number (RAL 0000)
RGB to HKS®
convert from RGB red green blue to HKS®-number (HKS 00)
RGB to PANTONE®
convert from RGB red green blue to Pantone®-number (Pantone 0000)
RGB to Sherwin Williams®
convert from RGB red green blue to Sherwin Williams®-number (SW 0000)
RGB to NCS®
convert from RGB red green blue to NCS-number (S0000-X00X)
RGBA to HEX
convert from RGBA red green blue transparency to #RRGGBB
RGBA to CMYK
convert from RGBA red green blue transparency to CMYK cyan / magenta / yellow / black
RGBA to RAL®
convert from RGBA red green blue transparency to RAL®-number (RAL 0000)
RGBA to HKS®
convert from RGBA red green blue transparency to HKS®-number (HKS 00)
RGBA to PANTONE®
convert from RGBA red green blue transparency to Pantone®-number (Pantone 0000)
RGBA to Sherwin Williams®
convert from RGBA red green blue transparency to Sherwin Williams®-number (SW 0000)
RGBA to NCS®
convert from RGBA red green blue transparency to NCS-number (S0000-X00X)
CMYK to HEX
convert from CMYK cyan / magenta / yellow / black to #RRGGBB
CMYK to RGB
convert from CMYK cyan / magenta / yellow / black to RGB red green blue
CMYK to RGBA
convert from CMYK cyan / magenta / yellow / black to RGBA red green blue transparency
CMYK to RAL®
convert from CMYK cyan / magenta / yellow / black to RAL®-number (RAL 0000)
CMYK to HKS®
convert from CMYK cyan / magenta / yellow / black to HKS®-number (HKS 00)
CMYK to PANTONE®
convert from CMYK cyan / magenta / yellow / black to Pantone®-number (Pantone 0000)
CMYK to Sherwin Williams®
convert from CMYK cyan / magenta / yellow / black to Sherwin Williams®-number (SW 0000)
CMYK to NCS®
convert from CMYK cyan / magenta / yellow / black to NCS-number (S0000-X00X)
HEX to RGB
convert from #RRGGBB to RGB red green blue
HEX to RGBA
convert from #RRGGBB to RGBA red green blue transparency
HEX to CMYK
convert from #RRGGBB to CMYK cyan / magenta / yellow / black
HEX to RAL®
convert from #RRGGBB to RAL®-number (RAL 0000)
HEX to HKS®
convert from #RRGGBB to HKS®-number (HKS 00)
HEX to PANTONE®
convert from #RRGGBB to Pantone®-number (Pantone 0000)
HEX to Sherwin Williams®
convert from #RRGGBB to Sherwin Williams®-number (SW 0000)
HEX to NCS®
convert from #RRGGBB to NCS-number (S0000-X00X)
RAL® to RGB
convert from RAL®-number (RAL 0000) to RGB red green blue
RAL® to RGBA
convert from RAL®-number (RAL 0000) to RGBA red green blue transparency
RAL® to CMYK
convert from RAL®-number (RAL 0000) to CMYK cyan / magenta / yellow / black
RAL® to HEX
convert from RAL®-number (RAL 0000) to #RRGGBB
RAL® to HKS®
convert from RAL®-number (RAL 0000) to HKS®-number (HKS 00)
RAL® to PANTONE®
convert from RAL®-number (RAL 0000) to Pantone®-number (Pantone 0000)
RAL® to Sherwin Williams®
convert from RAL®-number (RAL 0000) to Sherwin Williams®-number (SW 0000)
RAL® to NCS®
convert from RAL®-number (RAL 0000) to NCS-number (S0000-X00X)
HKS® to RGB
convert from HKS®-number (HKS 00) to RGB red green blue
HKS® to RGBA
convert from HKS®-number (HKS 00) to RGBA red green blue transparency
HKS® to CMYK
convert from HKS®-number (HKS 00) to CMYK cyan / magenta / yellow / black
HKS® to HEX
convert from HKS®-number (HKS 00) to #RRGGBB
HKS® to RAL®
convert from HKS®-number (HKS 00) to RAL®-number (RAL 0000)
HKS® to PANTONE®
convert from HKS®-number (HKS 00) to Pantone®-number (Pantone 0000)
HKS® to Sherwin Williams®
convert from HKS®-number (HKS 00) to Sherwin Williams®-number (SW 0000)
HKS® to NCS®
convert from HKS®-number (HKS 00) to NCS-number (S0000-X00X)
PANTONE® to RGB
convert from Pantone®-number (Pantone 0000) to RGB red green blue
PANTONE® to RGBA
convert from Pantone®-number (Pantone 0000) to RGBA red green blue transparency
PANTONE® to CMYK
convert from Pantone®-number (Pantone 0000) to CMYK cyan / magenta / yellow / black
PANTONE® to HEX
convert from Pantone®-number (Pantone 0000) to #RRGGBB
PANTONE® to RAL®
convert from Pantone®-number (Pantone 0000) to RAL®-number (RAL 0000)
PANTONE® to HKS®
convert from Pantone®-number (Pantone 0000) to HKS®-number (HKS 00)
PANTONE® to Sherwin Williams®
convert from Pantone®-number (Pantone 0000) to Sherwin Williams®-number (SW 0000)
PANTONE® to NCS®
convert from Pantone®-number (Pantone 0000) to NCS-number (S0000-X00X)
Sherwin Williams® to RGB
convert from Sherwin Williams®-number (SW 0000) to RGB red green blue
Sherwin Williams® to RGBA
convert from Sherwin Williams®-number (SW 0000) to RGBA red green blue transparency
Sherwin Williams® to CMYK
convert from Sherwin Williams®-number (SW 0000) to CMYK cyan / magenta / yellow / black
Sherwin Williams® to HEX
convert from Sherwin Williams®-number (SW 0000) to #RRGGBB
Sherwin Williams® to RAL®
convert from Sherwin Williams®-number (SW 0000) to RAL®-number (RAL 0000)
Sherwin Williams® to HKS®
convert from Sherwin Williams®-number (SW 0000) to HKS®-number (HKS 00)
Sherwin Williams® to PANTONE®
convert from Sherwin Williams®-number (SW 0000) to Pantone®-number (Pantone 0000)
Sherwin Williams® to NCS®
convert from Sherwin Williams®-number (SW 0000) to NCS-number (S0000-X00X)
NCS® to RGB
convert from NCS-number (S0000-X00X) to RGB red green blue
NCS® to RGBA
convert from NCS-number (S0000-X00X) to RGBA red green blue transparency
NCS® to CMYK
convert from NCS-number (S0000-X00X) to CMYK cyan / magenta / yellow / black
NCS® to HEX
convert from NCS-number (S0000-X00X) to #RRGGBB
NCS® to RAL®
convert from NCS-number (S0000-X00X) to RAL®-number (RAL 0000)
NCS® to HKS®
convert from NCS-number (S0000-X00X) to HKS®-number (HKS 00)
NCS® to PANTONE®
convert from NCS-number (S0000-X00X) to Pantone®-number (Pantone 0000)
NCS® to Sherwin Williams®
convert from NCS-number (S0000-X00X) to Sherwin Williams®-number (SW 0000)