Sherwin Williams Castlegate SW 9558
Contentsshow +hide -
- Castlegate for bedroom (1 photo)
- Castlegate for living room (7 photos)
- Sherwin Williams Castlegate for bathroom (2 photos)
- Sherwin Williams SW 9558 on kitchen cabinets (4 photos)
- Sherwin Williams Castlegate reviews (9 photos)
- What are Sherwin Williams Castlegate undertones?
- Is Castlegate SW 9558 cool or warm?
- How light temperature affects on Castlegate
- Monochromatic color scheme
- Complementary color scheme
- Color comparison and matching
- LRV of Castlegate SW 9558
- Color codes
- Color equivalents
| Code: | SW 9558 |
| Name: | Castlegate |
| Brand: | Sherwin Williams |
| Collections: | Emerald Designer Edition - Minimal + Modern |
What color is Sherwin Williams Castlegate?
Sherwin Williams Castlegate SW 9558 is a muted, medium-light gray with a faint cool blue-green cast. Its low saturation keeps it from reading icy, while the slightly deeper value gives walls more presence than a pale silver gray. In bright daylight, Castlegate can look clean and gently mineral; under warm lamps, it may settle into a softer, more neutral gray. It suits living rooms, bedrooms, and home offices where a calm gray is wanted without a stark white backdrop. Pair it with crisp off-whites, charcoal accents, weathered oak, brushed nickel, or black metal for a grounded, contemporary finish.
Castlegate for bedroom
We’ve hand-picked a beautiful collection of photos of this amazing grey shade used in real bedrooms. Take a look and imagine how this wonderful cool mid-tone paint color could transform your own bedroom space.

Castlegate for living room (7 photos)
Check out this stunning mid-tone color used in real living rooms. Explore how this grey shade can create a unique space







Sherwin Williams SW 9558 for bathroom (2 photos)
Looking for inspiration for your dream bathroom renovation project? These beautiful handpicked photos will show you this delightfully cool mid-tone grey real bathrooms.


Sherwin Williams SW 9558 on kitchen cabinets (4 photos)
Want a stylish kitchen? View real-life photo examples of this fascinating cool grey hue is paired with backsplashes, countertops, and hardware.




Sherwin Williams Castlegate reviews (9 photos)
View the photos of real spaces painted with this grey that were not included in specific categories. Close-ups, painted furniture, storages and dressers, hallways, stairs and ceilings.









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What are Sherwin Williams Castlegate undertones?
Castlegate is a mid-light, near-neutral medium gray. Its chroma is so low that assigning a specific hue-based undertone would be misleading. Because it is close to neutral, nearby surfaces and the color of the light can noticeably change how warm or cool it appears.
HEX value:
RGB code:
160, 165, 165
Is Sherwin Williams Castlegate cool or warm?
With a hue of 180°, this Grey leans cool, but it is near the neutral line and may feel warmer in certain lighting.
SW 9558 Castlegate HSL code: 180, 3%, 64%
Hue - degree on a color wheel from 0 to 360. 0 is red, 120 is green, and 240 is blue.
Saturation is expressed as a percentage. At 0%, it appears as a shade of grey, and at 100%, it is in full color.
Lightness is also a percentage value. 0% is black, and 100% is white.
How light temperature affects Castlegate
Natural Lighting. During the day, natural light shifts from about 2000 K at sunrise/sunset to 5500–6500 K at noon.
In addition, natural-light temperature depends on its direction:
| Direction of sunlight | Visible temp. | Hue | Duration |
|---|---|---|---|
| North | Cool | Bluish | All day |
| East | Warm | Yellow | Before noon |
| West | Warm | Orange-red | After noon |
| South | Warm | Orange-yellow | All day |
Artificial Lighting. When choosing bulbs, pay attention to their color temperature in Kelvins.
Use the slider to see how this Grey shade looks under different lighting:


4000K
Coordinating colors.
Colors that go with Sherwin Williams Castlegate:
Monochromatic color scheme
This scheme consists of various shades, tints, and tones of a single color. While it offers a perfect combination of hues, without accent décor it may become monotonous.
Lighter shades
Complementary color scheme
This color scheme is a combination of two shades that are opposite each other on the color wheel. The high contrast between these colors creates a vibrant and dynamic visual effect. For the color Castlegate with a green hue, complementary colors are those with a red hue close to 0, such as Sherwin Williams Mauve Tinge and Studio Mauve.
LRV of Castlegate
Castlegate has an LRV of 37.02% and refers to Medium colors that reflect a lot of light. Why LRV is important?
Light Reflectance Value measures the amount of visible and usable light that reflects from a painted surface.
Simply put, the higher the LRV of a paint color, the brighter the room you will get.
The scale goes from 0% (absolute black, absorbing all light) to 100% (pure white, reflecting all light).
Act like a pro: When choosing paint with an LRV of 37.02%, pay attention to your bulbs' brightness. Light brightness is measured in lumens. The lower the paint's LRV, the higher lumen level you need. Every square foot of room needs at least 40 lumens. That means for a 200 ft2 living room you'll need about 8000 lumens of light – e.g., eight 1000 lm bulbs.
Color codes
We have collected almost every possible color code you could ever need.
Not sure what the difference between HEX and RGB is? We break down color models in plain language. Understanding color models
| Format | Code |
|---|---|
| HEX | #a0a5a5 |
| RGB Decimal | 160, 165, 165 |
| RGB Percent | 62.75%, 64.71%, 64.71% |
| HSV | Hue: 180° Saturation: 3.03% Value: 64.71% |
| HSL | hsl(180, 3, 64) |
| CMYK | Cyan: 3.03 Magenta: 0.0 Yellow: 0.0 Key: 35.29 |
| YIQ | Y: 163.505 I: -2.98 Q: -1.058 |
| XYZ | X: 34.742 Y: 37.1 Z: 40.918 |
| CIE Lab | L:67.352 a:-1.777 b:-0.616 |
| CIE Luv | L:67.352 u:-2.807 v:-0.6 |
| Decimal | 10528165 |
| Hunter Lab | 60.91, -4.779, 2.807 |
Color equivalents
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SW 7073
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Power Gray
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N510-4
Supernova
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AF-700
Storm
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Delray Gray
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N500-4
Pencil Sketch
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RAL 9006
White aluminium
RAL Classic



