RAL 5021 Water Blue Paint

Actual color may vary from on-screen representation. Please view a physical color swatch or material sample to confirm your color choice prior to purchase.

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RAL5021 Water Blue is a saturated, dark cyan blue with clear cool undertones. With an L value of 42.7 and an LRV of 12.96, this color reads as distinctly deep and richnot pastel or mid-tone. Strongly cool, indicated by a hue angle of 196.48 and strongly negative a (-34.71) and moderate negative b (-10.27), which places it firmly in the blue-green/cyan family. High chroma (36.2) results in a bold, vivid visual impact, especially on larger, solid surfaces. The color has a strong cyan/blue-green cast, with no sign of neutrality. In gloss or semi-gloss finishes, RAL5021 Water Blue will appear slightly deeper and more saturated, while matte applications may mute the richness of the color.

This shade is frequently used for industrial machinery and equipment where standardized RAL colors are specified, as well as architectural metalwork such as window frames, doors, railings, and panels. It is also selected for wayfinding, pipes, and safety markings requiring high chroma, and for public transport assets including shelters, benches, and enclosures. Marine and aquatic-related applications often utilize it for equipment and park infrastructure, and it is commonly chosen for specification-driven OEM touch-ups or repaints.

RAL5021 Water Blue is best used where a bold, cool, and unmistakably technical blue-green is requiredespecially in RAL-standardized environments. Its low LRV and high chroma provide strong color presence but limited light reflectance, helping to mask surface dirt and minor markings. Under bright lighting, the colors vividness is enhanced, while subdued light or matte finishes tone down its intensity. Color uniformity is generally strong, but for projects where sheen or application method is critical, a physical sample is recommended. The color may appear cooler and deeper than typical blues, and adjacent lighter or more neutral colors will accentuate its richness.

Digital approximations
Values
HEX: #007475
RGB: 0, 116, 117
LAB: 42.7, -34.7, -10.3
Insights
- The low L value (42.7) and LRV (12.96) mean this is a visually deep color, not suitable where high reflectivity or brightness is needed.
- Strongly negative a and moderate negative b values numerically confirm the cool, cyan blue-green tone.
- High chroma (36.2) and the RGB split (G/B dominant) result in a pronounced, modern technical blue-green in digital renderings.

Digital values are approximations.
Paint appearance varies by finish and lighting.

Similar colors:
- RAL5018 Turquoise Blue lighter and less saturated, with a slightly more greenish cast.
- RAL5020 Ocean Blue darker and subtly more muted, appearing deeper and less chromatic.
- RAL5012 Light Blue much lighter, more blue than green, and less visually intense.

Product Data

See Technical Data Sheets
See Safety Data Sheets

About RAL

RAL is a European Color Standard often used for powder coating products and equipment. MyPerfectColor helps manufacturers; fabricators; refurbishers; equipment supply, rental and maintenance organizations save money and improve quality through exact match color solutions. Some common requests we receive for RAL Colors include spray paint, pens and bottles used for touch up and OEM applications.

Representation of the RAL Colours is done with the approval of RAL gGmbH, 53111 Bonn, Germany.

Please note that the representation of colours on the website can only approximate the actual RAL colour shades as they are registered as varnish samples.

RAL CLASSIC © RAL, Bonn 2019.

RAL DESIGN SYSTEM © RAL, Bonn 2019.

RAL EFFECT © RAL, Bonn 2019.

RAL colors may vary from RAL Color Standards based on lighting conditions, angle of view and/or due to differences in pigments, manufacturing process, substrate and/or limitations in the color capability of the paint.

Frequently Asked Questions About RAL 5021 Water Blue Paint

When is a standard RAL 5021 Water Blue match acceptable, and when should we request a sample/OEM match?

RAL 5021 Water Blue is a standardized color target. It does not specify gloss, texture, resin, or application method. Decide based on acceptance risk:

Use a standard RAL 5021 match when: cross-material coordination is expected (powder vs liquid, different textures/sheens), small or low-visibility repairs, functional maintenance where close visual harmony is sufficient, or parts are not viewed side-by-side under inspection lighting.
Request a sample/OEM match when: the surface is high-visibility or large-area, the new work sits adjacent to existing parts, there are strict inspection/acceptance criteria, the original is a specific OEM powder code/texture, or the existing parts are aged/UV-shifted.

Reduce acceptance risk: confirm whether the reference is the RAL standard (fan deck/digital target) or an existing coated part. Specify required gloss/texture, light source for evaluation, and acceptance method (visual vs instrument). For RAL 5021 (blue/green family), small hue shifts are the most noticeable; sheen and texture differences between powder and liquid can further change appearance.

Which touch-up product is best for RAL 5021 Water Blue: pen, brush bottle, or aerosol?

Paint pen: pinpoint chips, pinholes, and edge nicks up to ~2 mm. Fast, controlled application. Expect a small gloss edge; texture will not match textured powder coats.
Brush bottle: scratches, chips, and spot repairs up to a few square inches. Good for filling and feathering. Use when you can lightly scuff and spot-prime. Best on satin-gloss surfaces; matte/texture differences will remain visible.
Aerosol spray: panels, brackets, or areas larger than a few square inches up to a few square feet. Provides better blend and film uniformity. Choose the sheen that best aligns with the part. For textured powders, you may still see a texture mismatch; consider a texture-capable system or a custom match to the OEM powder if appearance is critical.

Note: Touch-up products match the RAL 5021 color target but cannot replicate unknown original texture or sheen exactly. For adjacent, high-visibility repairs, a sample-based or OEM powder match lowers rejection risk.

What prep is required to touch up RAL 5021 Water Blue on an existing powder-coated part?

Identify the acceptance reference: standard RAL 5021 vs the existing part. Select a compatible sheen.
Clean: wash with detergent and water, rinse, dry. Wipe with lint-free cloth and compatible solvent (e.g., isopropyl alcohol). Avoid silicone products.
De-gloss/scuff: for small spots use 600-800 grit; for larger blends use 320-400 grit. Feather any coating edges.
Corrosion repair: remove rust to bright metal; treat or convert if needed. Spot-prime bare metal with a compatible primer (e.g., epoxy). Let it dry per datasheet.
Mask and dust control: mask adjacent areas; tack-wipe before coating.
Apply light coats: especially over powder to minimize solvent attack. Allow recommended flash times. Build to coverage rather than flooding.
Environmental conditions: apply within product temperature/humidity window; avoid condensation and direct sun heating.
Verify: test an inconspicuous area first to confirm adhesion and appearance under the same light used for inspection.

These steps improve adhesion and appearance but cannot eliminate texture/sheens differences between the original powder coat and a liquid touch-up. For large or adjacent repairs with tight inspection, consider a custom match to the specific part/OEM powder in RAL 5021 Water Blue.

When will I receive my paint matching RAL5021 Water Blue? Can I get it right away?

All paint is custom-made to order. Most orders ship quickly—often within 1–2 business days—though actual lead time can vary based on production volume. Custom spray paint, paint pens, and brush-in-cap bottles, including colors matched to RAL5021 Water Blue, typically ship within 1–2 business days. During peak periods, lead times may vary slightly. Transit time depends on your location and the shipping method you choose. If timing is critical, select Expedited Production at checkout—most expedited orders ship within 24 business hours—or contact MyPerfectColor so we can help confirm timing for your specific deadline. Learn more about paint production lead times.

Can I use RAL5021 Water Blue for touching up powder coating?

Yes, our spray paint, paint pens and touch up bottles are ideal for touching up parts of all kinds, including powder coatings. However, keep in mind that our version of RAL5021 Water Blue is based on the color swatch contained in the official RAL color book. The color and sheen of your specific production parts may be different. If you need a touch up application, we can create a touch up solution precisely matching your specific parts.

Learn more about our color matching service.

What are the RGB, HEX and LRV values for RAL5021 Water Blue?

The RGB values for RAL5021 Water Blue are 0, 116, 117 and the HEX code is #007475. The LRV for RAL5021 Water Blue is 12.96. The LRV stands for Light Reflectance Value and measures the percentage of light that a color reflects. Learn more about using RGB and Hex codes for matching colors.

What is spray paint matched to RAL5021 Water Blue made of? And how much area will one can cover?

MyPerfectColor spray paint is a fast-drying durable acrylic enamel coating suitable for interior or exterior use. MyPerfectColor custom spray paint matched to RAL5021 Water Blue enables you to conveniently achieve a professional spray-smooth finish in any color in any sheen. It sticks well to most surfaces including metal, plastics, powder-coatings, cabinets and primed or previously painted wood.

The MyPerfectColor 11oz spray can will cover about 20 square feet per coat. Keep in mind that it is difficult to gauge spray paint need as the coverage is highly dependent on how it is applied. Learn more about how spray paint works at MyPerfectColor.

How to buy paint for RAL5021 Water Blue?

Many types of paint are available for RAL5021 Water Blue with no minimum order quantities. MyPerfectColor offers spray paint, paint pens, touch up bottles, water-based acrylics, epoxies, urethanes and a variety of other paints. Select the Paint Type button above to get started. Learn more about buying paint at MyPerfectColor.

How do I get the SDS (Safety Data Sheet) for paint matched to RAL RAL5021 Water Blue?

The RAL5021 Water Blue is the color and the SDS is based on the type of paint used to make the color. You can find Safety Data Sheets here for our most popular products.

Do I need a primer for RAL5021 Water Blue?

The need for primer for RAL5021 Water Blue depends on the type of paint, the substrate being painted and where it will be located. See our Primer Selection Table to see what primer you might need and learn more about when you might need a primer. Most people don't use a primer for a touch up paint application, but a primer may improve adhesion and is typically recommended for exterior applications.

How do I convert RAL5021 Water Blue to a different color from another paint company?

While we can provide RAL5021 Water Blue in paint, we don't provide any crossover information. We've found that every paint company offers its own unique selection of colors and rarely does a color have an exact equivalent in another brand.

However, under the color image on a color page there is a link that says "Explore Colors". Clicking this link displays colors with similar values and you can look for any colors from the brand you want.

Keep in mind that this just shows similar colors based on the color values we have stored in our database. It doesn't mean it is the same or give any approximation about how close the color is. You can play around with the Hue, Lightness and Chroma sliders to expand the selection.