Windy Blue Sherwin-Williams · SW 6240 LRV 48

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Windy Blue review: Sherwin-Williams SW 6240

Windy Blue in real light

Same sample board, four compass directions: this is the standardized shot list every color on this site gets, so you can compare across colors and not just across one photographer's living room. Photos for this color are still being shot; the notes below are what to expect from the color's undertone.

North light North light amplifies Windy Blue's cool or green cast; expect the truest read of its undertone here, for better or worse.
East light Morning east light is warm and golden, so Windy Blue looks brightest and warmest early in the day, then cools and flattens by afternoon as the light moves west.
South light South light is bright and warm most of the day, which can soften Windy Blue's cooler undertone without erasing it.
West light Afternoon west light is warm and can run intense right at sunset, then goes flat and cool in the morning before the sun reaches that side of the house.

soft gray-blue, faint green cast, the lightest blue on this site.

Closest match in other brands

Ranked by Delta-E (perceptual color distance) between Windy Blue and every color from other brands on this site: nearest first.

Stonington Gray Benjamin Moore HC-170 Wickham Gray Benjamin Moore HC-171 Gray Owl Benjamin Moore OC-52

Recommended Painting & Testing Supplies

Test undertones accurately in your home's natural light and get clean, professional paint results.

Painter's Gear
Cabinet & Trim Pro Sprayer

Wagner Control Spray Max HVLP Turbine Paint Sprayer

High-volume low-pressure stationary turbine sprayer with variable air pressure control and three spray patterns. Delivers a factory-smooth, brushmark-free finish on interior doors, trim, shiplap, and kitchen cabinets.

Eliminates brush strokes and cuts painting time by 70 percent on trim and cabinets
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Color Testing Testing Essential

Peel-and-Stick Repositionable Paint Sample Boards (10-Pack)

White repositionable adhesive sample sheets. Paint your test color once and move the swatch across north, south, east, and west walls as natural daylight shifts through morning and afternoon.

Eliminates sanding and priming over test patches on your drywall
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Surface Prep Crisp Edges

FrogTape Multi-Surface Painter's Tape with PaintBlock

Treated with super-absorbent PaintBlock technology that reacts instantly with water in latex paint to form a gel micro-barrier along tape edges for razor-sharp borders.

Guarantees crisp borders along baseboards, ceilings, and window casings
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Cutting-In Pro Choice

Purdy Clearcut Elite Angled Sash Trim Brush (2.5-Inch)

Handcrafted stiff nylon and polyester blend angled trim brush engineered for clean, confident cutting-in along ceiling corners and door frames without needing tape.

Holds extra paint and maintains a sharp edge for clean freehand cutting
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Wall Application Room Kit

Wooster Pro 9-Inch Microfiber Roller Kit with Canvas Drop Cloth

Complete room painting kit featuring non-shed microfiber 3/8-inch nap roller covers, heavy-duty cageless frame, steel paint tray, and premium 8-ounce cotton canvas floor protection.

Delivers uniform, lint-free wall coverage and protects wood floors from spills
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Area Estimation Accuracy Must

Bosch Compact 65-Foot Laser Measure Tool with Backlit Screen

Pocket-sized precision laser distance measure with real-time measurement mode. Instantly calculates wall square footage, ceiling heights, and room perimeter to order exact paint gallons.

Prevents buying extra costly paint gallons or running short mid-wall
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Interior Paint Sheen & Finish Matrix

How gloss levels interact with light reflectance (LRV), washability, and wall texture across every room.

Paint Sheen Reflection Range Durability & Cleaning Optimal Placement
Flat / Matte 0% to 5% reflection Low washability; touch-ups blend easily Ceilings and low-traffic formal living rooms with drywall flaws.
Eggshell 10% to 25% soft glow Moderate washability; wipes clean gently Master bedrooms, dining rooms, and home offices with moderate light.
Satin 25% to 35% pearl sheen High stain resistance and scrubbable Hallways, family living rooms, foyers, and children playrooms.
Semi-Gloss 35% to 55% sleek shine Maximum moisture and mildew resistance Kitchens, bathrooms, baseboards, door casings, and window trim.
High-Gloss 70%+ glass-like reflection Extreme surface hardness and scuff proof Exterior front doors, kitchen cabinets, and architectural millwork.
Designer Tip
Directional Daylight and Undertone Shifts: A paint color never looks the same on all four walls. North-facing rooms receive cool, grayish-blue indirect daylight that draws out green and purple undertones, making cool grays look cold and sterile. Counteract north light by choosing warm neutrals with creamy beige undertones and LRV above 60. Conversely, south-facing rooms get warm golden sunlight all day that amplifies warm yellows and pinks, allowing cooler slate grays and muted blues to shine without feeling chilly.

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