Looking for color by Hex, RGB, CMYK, or Lab?

Match of James Hardie™ Slate Blue *

Color Image

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.

Fast Shipping

70% of Orders Ship within 3 Business Days.

Ready to purchase? Select your options in the 4 steps below.

Step 1: Select Paint Type / Application

Spray, OEM, Bottles and Pens

House and Wall Paint

Epoxy, Urethane, and Colorant Concentrate


A match of James Hardie Slate Blue is a muted blue-gray with a cool bias, low chroma, and a slight green-leaning undertone. It reads deeper than a pale blue and softer than a clean navy, with a restrained, weathered character rather than a bright or saturated one.

For shipping damage, installation marks, field cuts, or service repairs on factory-finished siding components, use an Original Material Match product when direct touch up is required because that option includes a sheen match. MyPerfectColor spray paint matched to this reference is also useful for replacement siding trim, soffit vents, fascia pieces, shutters, brackets, fastener covers, railings, and other ancillary parts that need to coordinate with the James Hardie siding color.

Because this is a fairly low-chroma, medium-deep color, gloss level and substrate texture can change how blue or gray it appears after spraying. On darker or uneven surfaces, the tone may read slightly deeper or show edge contrast more readily, while a smoother, well-prepared surface usually gives a more even result. For direct touch up on factory-finished building materials, choose Original Material Match; other MyPerfectColor formats can still be used for separate parts or broader repainting when a sheen-matched touch up is not the goal.

Similar colors:

JH70-20 Boothbay Blue
Gray Slate
Slate Steps

Product Data

About James Hardie

James Hardie is a world-leading, specialized, high-technology manufacturer of a wide range of fiber-cement building materials. These materials are available in a comprehensive selection of colors.

Matching James Hardie Paint Colors

MyPerfectColor is able match all of the James Hardie colors so you can find and enjoy the colors you love. MyPerfectColor uses its expert capabilities to recreate the original James Hardie color by matching the original James Hardie color books and swatches.

The colors shown on this website are computer video simulations of the James Hardie Color and may not match James Hardie Color standards. Refer to James Hardie Publications to obtain the accurate color. Please know that MyPerfectColor is matching the original James Hardie color. If you intend to touch up paint that has been on your walls for years, know that your color has undoubtedly changed from the original due to exposure to light and age and the new paint may not match. You will achieve best results by re-coating the entire surface.

If you need more assistance, please feel free to contact us and one of our expert staff would be happy to help.

Frequently Asked Questions About Match of James Hardie™ Slate Blue *

Can I use James Hardie Slate Blue 90449 for touch-up after shipping damage, installation damage, or field-cut work on siding?

Yes, if you order the James Hardie Slate Blue matched product that is labeled Original Material Match. In this collection, that is the option meant for direct touch-up because it includes a sheen match.

Use it for scratches, rub marks, edge damage, missed spots, and similar repair work on factory-finished siding. It can help the repaired area blend better, but it does not guarantee an invisible repair on aged or weathered material.

Will James Hardie Slate Blue 90449 match older installed siding beside weathered material?

It may be the right color reference, but older installed siding can read differently because of sun exposure, weathering, chalking, sheen change, texture, and batch variation. That means the original James Hardie Slate Blue reference can look different next to an aged surface even when the match is correct.

If the repair area is highly visible or the tolerance is tight, test first on the actual substrate or use an existing-part or factory-sample comparison when available.

Which product format should I choose for James Hardie Slate Blue 90449: Original Material Match, housepaint, urethane, or epoxy?

For direct touch-up on factory-finished building materials, choose Original Material Match when it is available. That is the only option in this collection that is suitable for touch-up because it includes a sheen match.

Water-based housepaint, urethane, and epoxy can still be color-matched to James Hardie Slate Blue, but they are better suited to separate parts, accessories, or broader repainting where a sheen-matched touch-up is not the goal.

How should James Hardie Slate Blue 90449 be used for siding, trim, or nearby exterior accessories?

A match of James Hardie Slate Blue is a building-material color reference tied to James Hardie siding, so it is useful when you need a matched paint for siding-related parts and accessories. That can include replacement boards, trim pieces, soffit, fascia, gutters, flashings, shutters, vents, and similar items that need to blend with nearby factory-finished material.

If the job is a direct touch-up on a factory-finished surface, use the Original Material Match option. If you are painting a separate part to coordinate with the siding, a matched MyPerfectColor product can still be the right choice even when the goal is not a direct touch-up.

What prep should I do before applying James Hardie Slate Blue 90449 to siding or a related building-material surface?

Clean the surface first, remove dirt and grease, and follow with the prep that fits the actual substrate. Light scuffing may help on some surfaces, but metal, vinyl, fiber cement, laminates, and previously coated parts do not all behave the same.

Choose primer based on the material, and test on the actual substrate before finishing the full repair. For factory-finished touch-up work, still select Original Material Match when that option is available because it includes the sheen match needed for this collection.

How quickly will I receive my paint matched to James Hardie Slate Blue?
All paint is custom-made to order. While most orders ship within 48 hours, the lead-time for paint made to match James Hardie Slate Blue depends on the type of paint needed. Interior and exterior house paints usually ship within 1 to 3 business days, while custom spray paint typically takes 3-5 business days to ship. The transit time depends on your location and the shipping method you choose. If your need is immediate, select Expedited Production during checkout. Most expedited production orders ship within 24 hours on business days. Please contact MyPerfectColor if you are concerned about a specific deadline. We do our best to make sure you get your paint on time. Learn more about paint lead times at MyPerfectColor.
Can I use this James Hardie Slate Blue paint to touch up my James Hardie materials?

It depends. MyPerfectColor matches the color of the James Hardie Slate Blue but may not match the sheen. If you see Custom Sheen as a sheen option, this means we also match the sheen of the material, otherwise you would need to pick the closest sheen available. However, keep in mind that our version of the James Hardie Slate Blue is based on matching an official James Hardie color sample. The color and sheen of your specific James Hardie parts may vary. If your material is not new and has been exposed to the weather, then it is likely that the color has changed over time. MyPerfectColor samples not been exposed to sunlight and weather. If you need a touch up application, you may need to send us a part so we can create a touch up solution precisely matching the current color and sheen of your specific materials.

Learn more about our color matching service.

What are the RGB, HEX and LRV values for James Hardie Slate Blue?
The RGB values for James Hardie Slate Blue are 114, 132, 138 and the HEX code is #72848A. The LRV for James Hardie Slate Blue is 22.06. The LRV stands for Light Reflectance Value and measures the percentage of light that a color reflects. Learn more about Light Reflectance Values and using RGB and Hex codes for paint.
What paint type is used to make spray paint matched to James Hardie Slate Blue? And how many spray cans do I need?

MyPerfectColor uses an acrylic enamel which is a fast-drying durable coating suitable for interior or exterior use. MyPerfectColor custom spray paint matched to James Hardie Slate 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 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.

Can I paint gutters to match my James Hardie siding?
Absolutely. You can use the MyPerfectColor spray paint matching the James Hardie Slate Blue to paint your gutters to match your siding. The spray paint will enable you to conveniently achieve a spray smooth finish. Learn more about custom spray paint.
Can you paint James Hardie siding with James Hardie Slate Blue?

MyPerfectColor Paint matching the James Hardie Slate Blue can be used to paint siding and any other items you'd like to blend into your exterior such as windows, doors, lights, pipes, gutters and vents. Many types of paint are available 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. The best paint for painting siding is exterior house paint (usually low lustre sheen). Spray paint works great for windows, doors, lights, pipes, vents and more.

Paint can be purchased by choosing the paint type above. Contact MyPerfectColor support if you have specific questions about the best paint to use for your project.

How does MyPerfectColor match the James Hardie Slate Blue?

MyPerfectColor has the original James Hardie color samples. A sample of the James Hardie Slate Blue you are looking for is in our library. We are able to make paint and verify that it matches the original.

Please note that if your existing materials are not new and you are trying to touch up, they will have aged and are likely different now than they were when new. MyPerfectColor will be sending paint matching the sample at our facility which has not aged the same as your materials and may also be different due to other factors such as variations in manufacturing processes. If your match is critical, you may consider sending a part of your materials for precise color matching. Learn more about our color matching services.

Does paint matched to James Hardie Slate Blue need primer if I am painting outside?
The need for primer for Slate 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.