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Concrete Gray is not one universal color. In the RAL system, RAL 7023 Concrete Gray is a defined industrial paint reference, but organizations also publish their own colors under the same name. For a reliable result, identify the required standard or brand palette first, then use its RGB/HEX, CMYK, or physical paint specification for the medium you are producing.
What color is Concrete Gray?
“Concrete Gray” usually describes a muted, medium gray associated with unfinished concrete, but the name alone does not identify one exact color. It can refer to RAL 7023, a corporate brand color, a digital swatch, or a custom paint mix. Those references may look noticeably different even though they share the same label.
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The safest construction and design specification is therefore a named system plus code—for example, RAL 7023 Concrete Gray—rather than “Concrete Gray” by itself. If a project uses a brand guide, that guide takes priority over a generic web color or a RAL approximation.
Concrete Gray reference values at a glance
| Reference | RGB | HEX | Where it applies | Source |
|---|---|---|---|---|
| RAL 7023 Concrete Gray | Not supplied in the cited catalog | Not supplied in the cited catalog | RAL physical paint and coating specification | Siemens SIMOTICS SD catalog |
| Style-guide Concrete Gray | 145, 150, 150 | #939598 | Web and brand assets in that guide | Style Guide: Quick Reference |
| Yuba-Sutter Transit Concrete Gray | 191, 190, 190 | #BFBEBE | That agency’s identity palette | Yuba-Sutter Transit brand guidelines |
These entries are not interchangeable. The two HEX values are organization-specific palette values, not alternate digital names for RAL 7023. A screen color can be useful for a layout or rendering, but it cannot by itself certify that a coating, powder finish, tile, or concrete surface matches the RAL reference.
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What does RAL 7023 Concrete Gray mean?
RAL 7023 is the clearest standardized interpretation of the name in the supplied references. A Siemens SIMOTICS SD catalog lists 7023 as “Concrete gray” in its table of special RAL paint finishes. The same section instructs customers ordering a special RAL finish to provide the RAL number in plain text; in practice, that means specifying RAL 7023, not merely writing “concrete gray.”
RAL is a physical color system used for coatings and manufactured finishes. A RAL designation identifies a target color under that system, but the final appearance still depends on the coating product, gloss or texture, application method, substrate, curing, and lighting. A RAL code is therefore a much stronger purchasing and fabrication reference than a monitor swatch, while still requiring an agreed finish and sample when color tolerance is important.
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Brand teams often choose familiar descriptive names for their own palettes. “Concrete Gray” can be an internal label that has no relationship to RAL 7023. The cited style guide assigns the name to RGB 145/150/150 and HEX #939598, while Yuba-Sutter Transit assigns it to RGB 191/190/190 and HEX #BFBEBE. Both can be valid within their respective systems because each belongs to a different organization and purpose.
Color spaces also explain part of the confusion. RGB and HEX values describe light emitted by a display; CMYK values describe ink separations for print; RAL describes a physical reference used for coatings and products. Converting among these systems involves approximation, and the same numeric color can appear different on screens, paper, painted metal, plastic, or concrete. Treat the code as a specification for its intended medium, not as a universal color identity.
How do I choose the right Concrete Gray code?
Start with the authority that controls the project. Use this sequence before creating artwork, ordering materials, or approving a finish:
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- Identify the governing reference. Check the architectural finish schedule, owner’s standards, signage manual, product specification, or brand guide. Look for a RAL, paint-manufacturer, Pantone, RGB/HEX, CMYK, or other explicit code.
- Write the full designation. Record the system and value together, such as “RAL 7023 Concrete Gray,” “HEX #939598,” or “RGB 191, 190, 190.” Do not shorten a controlled color to its descriptive name.
- Match the code to the medium. Use RGB/HEX for screen-based assets when the applicable guide provides them. Use CMYK or the printer’s supplied profile for print. Use the physical color system and coating details for paint, powder coat, metal, plastics, or other manufactured parts.
- Confirm finish and tolerance. Gloss, satin, matte, texture, and substrate can change perceived lightness and saturation. State the finish, coating type, and acceptable variation in the purchase or submittal documents.
- Approve a sample where appearance matters. Compare a physical sample in the project’s actual lighting and beside adjacent materials before releasing a large order.
How should Concrete Gray be specified for a construction project?
A construction note should make the reference unambiguous and repeatable. A useful format is:
COLOR: RAL 7023 Concrete Gray
COATING: [manufacturer/product, if required]
FINISH: [matte, satin, gloss, texture]
SUBSTRATE: [steel, aluminum, concrete, panel, etc.]
SAMPLE: Submit physical color chip for approval before productionIf the project instead follows a proprietary brand palette, replace the RAL line with the approved brand code and identify the document revision. For digital signage, a website, or a presentation, include the RGB/HEX value and state that it is a screen representation of the approved color—not proof of a physical coating match.
When several trades are involved, put the same reference in the finish schedule, elevations, signage drawings, shop-drawing review comments, and purchase order. This prevents one supplier from interpreting “Concrete Gray” as RAL 7023 while another uses a brand’s lighter gray.
What HEX and RGB values can I use for digital work?
Use the value supplied by the owner or brand guide for the specific digital asset. Two documented examples are:
- #939598 — RGB 145, 150, 150, listed as Concrete Gray in the cited style guide.
- #BFBEBE — RGB 191, 190, 190, listed as Concrete Gray in Yuba-Sutter Transit’s guidelines.
Do not label either value “the HEX code for RAL 7023” unless the responsible color authority has explicitly approved that conversion. If a project requires a digital approximation of RAL 7023, document the conversion method, viewing conditions, and approval source, and keep the physical RAL reference as the controlling specification for manufactured work.
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For a web interface, define the selected color in the design tokens or stylesheet so every component uses the same value. Exported images, PDFs, and presentation software may apply their own color management, so check the final file rather than relying only on the design application’s swatch.
How do I check Concrete Gray for readable text?
Check the actual foreground and background pair in the final design; a gray that looks clear in isolation may fail when used for small text or icons. Yuba-Sutter Transit’s brand guidelines state that text and key information should maintain a minimum contrast ratio of 4.5:1 with its background to comply with the agency’s accessibility guidance. That ratio is a requirement cited in that agency’s document, not a guarantee that every use of Concrete Gray is accessible.
For a construction website, project portal, wayfinding screen, or printed sign, test normal text, large text, icons, and disabled states separately under the accessibility standard that governs the project. If a Concrete Gray background is too close to the text color, change the foreground, background, weight, size, or layout rather than trying to make the gray name carry the accessibility decision. Record the tested pair and the final medium in the design documentation.
Can I order RAL 7023 paint or touch-up coating?
Yes, suppliers may offer products matched to RAL 7023, but the RAL number alone does not define every property of the paint. A listing for an RAL 7023 touch-up product notes that physical appearance can vary with the product, sheen, application, substrate, age, and light source. Use the RAL number to identify the target, then confirm the coating chemistry, gloss level, application method, and intended surface with the supplier.
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For a repair, clean and prepare the substrate as specified by the coating manufacturer. Apply a test patch in an inconspicuous area and inspect it after the coating has fully cured. A wet sample, a freshly mixed batch, or a chip viewed under different lighting can appear unlike the finished repair. When a visible match is critical, request a physical sample or drawdown and approve it against the existing surface before ordering the full quantity.
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Why can a correct RAL 7023 sample still look wrong on site?
Color perception changes with illumination, surrounding colors, surface texture, and viewing angle. A smooth powder-coated panel reflects light differently from rough cast concrete; a matte finish scatters light differently from a gloss finish. Outdoor daylight, warm interior lamps, and overcast conditions can also shift the apparent balance between warm and cool gray.
For that reason, compare samples at the installation location and beside the materials that will remain next to them. Keep the sample clean, view it at normal distance, and inspect it at the times of day when the space is used. If the sample is approved, retain a labeled control chip with the project records so later repairs can be compared with the same reference.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What are the most common Concrete Gray specification mistakes?
- Using the name without a code: Different teams may select different grays while believing they followed the same instruction.
- Assuming a HEX value is a paint formula: Screen color does not specify pigment, binder, gloss, texture, or durability.
- Calling a brand value RAL 7023: A proprietary RGB/HEX entry remains proprietary unless its owner explicitly maps it to RAL.
- Ignoring finish: Matte, satin, gloss, and textured versions can have different visual readings even when the nominal color is the same.
- Approving under one light source: A match under a showroom lamp may diverge in daylight or on the installed surface.
- Skipping a sample for repairs: Age, weathering, and substrate differences can make a new coating stand out from the original.
- Checking accessibility only after launch: Contrast should be evaluated with the final text size, weight, background, and medium.
What is the most reliable workflow for approving Concrete Gray?
For a project that combines drawings, digital communication, and physical finishes, use one controlled record:
- List every application: paint, powder coat, concrete sealer, printed sign, website, PDF, and presentation graphics.
- Assign the controlling reference to each application. RAL 7023 may control a coating, while a brand guide controls the website or printed identity.
- Attach the exact code and source document to the submittal or digital asset brief.
- Specify finish, substrate, printer or coating process, and acceptable variation for physical work.
- Review a physical sample in project lighting and verify digital contrast with the final text and background.
- Archive the approved sample, code, finish, date, and supplier information for maintenance and future replacements.
This workflow prevents a common handoff failure: a designer sends a HEX swatch, a fabricator interprets it as a paint color, and the installed result is rejected even though each party used the words “Concrete Gray.”
Bottom line: which Concrete Gray should you use?
Use RAL 7023 when the project calls for the RAL standard, and write the full designation in every physical-finish document. Use #939598, #BFBEBE, or another RGB/HEX value only when the responsible brand or organization specifies it. Because “Concrete Gray” is an ambiguous name, the code, medium, finish, sample, and approval record matter more than the label alone.
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Frequently Asked Questions
Is RAL 7023 the same as the color of ordinary cured concrete?
No. Natural concrete varies with cement, aggregate, water content, curing, surface treatment, weathering, and lighting. RAL 7023 is a controlled color reference for products and coatings, not a claim that every concrete slab has that appearance.
Can a HEX-to-RAL converter give me an exact paint match?
It can suggest an approximation, but a digital conversion does not guarantee a physical match. Confirm the result with the coating supplier and approve a sample in the intended finish and lighting.
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Which finish should I choose for RAL 7023 on metal?
The color code does not choose the finish. Select matte, satin, gloss, or texture according to the appearance, cleaning, durability, and glare requirements of the project, then approve that finish with a sample.
How should I document a Concrete Gray repair years after installation?
Record the original system and code, coating product, sheen, substrate, application date, and an approved control chip. If the existing surface has weathered, compare a new sample directly with the installed area before repairing the whole component.
