Dulux Deep Fossil / Grey Steel 1 / 00NN 31/000
Contentsshow +hide -
- Deep Fossil for bedroom (3 photos)
- Deep Fossil for living room (7 photos)
- Dulux Deep Fossil for bathroom (3 photos)
- Dulux Deep Fossil reviews (9 photos)
- What are Dulux Deep Fossil undertones?
- Is Deep Fossil 00NN 31/000 cool or warm?
- How light temperature affects on Deep Fossil
- Monochromatic color scheme
- Complementary color scheme
- Color comparison and matching
- Color codes
- Color equivalents
| Code: | 00NN 31/000 |
| Name: | Deep Fossil |
| Brand: | Dulux |
What color is Dulux Deep Fossil?
Dulux Deep Fossil 00NN 31/000 is a muted mid-tone grey with an almost neutral cast and very low color saturation. Its balanced appearance keeps it from reading strongly blue, brown, or green, although changing daylight may bring out subtle differences in its grey character. Use it on living room or bedroom walls where a grounded, unobtrusive backdrop is wanted without the heaviness of charcoal. Deep Fossil also suits cabinetry, interior doors, and built-in shelving, especially alongside crisp white trim, black hardware, pale oak, concrete, or brushed metal. In brighter spaces, it appears soft and even; under lower light, it takes on a deeper, more reserved grey presence.
Deep Fossil for bedroom (3 photos)
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.



Deep Fossil 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







Dulux 00NN 31/000 for bathroom (3 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.



Dulux Deep Fossil 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 Dulux Deep Fossil undertones?
Deep Fossil is a midtone, 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:
143, 144, 143
Is Dulux Deep Fossil cool or warm?
With a hue of 120°, this Grey shade sits right in the neutral zone on the HSL color wheel—neither warm nor cool.
00NN 31/000 Deep Fossil HSL code: 120, 0%, 56%
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 Deep Fossil
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 Dulux Deep Fossil:
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
00NN 31/000
Deep Fossil
Darker shades
00NN 31/000
Deep Fossil
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 Deep Fossil with a yellow hue, complementary colors are those with a purple hue close to 300, such as Dulux Purple Sage 5 and Himalayan Musk 2.
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 | #8F908F |
| RGB Decimal | 143, 144, 143 |
| RGB Percent | 56.08%, 56.47%, 56.08% |
| HSV | Hue: 120° Saturation: 0.69% Value: 56.47% |
| HSL | hsl(120, 0, 56) |
| CMYK | Cyan: 0.69 Magenta: 0.0 Yellow: 0.69 Key: 43.53 |
| YIQ | Y: 143.587 I: -0.275 Q: -0.523 |
| XYZ | X: 26.258 Y: 27.769 Z: 29.956 |
| CIE Lab | L:59.68 a:-0.562 b:0.404 |
| CIE Luv | L:59.68 u:-0.512 v:0.666 |
| Decimal | 9408655 |
| Hunter Lab | 52.697, -3.276, 3.184 |
Color equivalents
272
Plummet
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114
Mid Lead Colour
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RAL 7042
Traffic grey A
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62GG 31/016
Storm Clearing
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30BB 31/022
Natural Slate
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RAL 7045
Telegrey 1
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Grey
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30BG 31/022
Quartz Flint 1
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CC7
Stoke
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Platinum grey
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RAL 7004
Signal grey
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250
Arquerite
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RAL 9022
Pearl light grey
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RAL 9007
Grey aluminium
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Undiscovered Forest
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30BB 31/043
Mineral Haze 1
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Stone grey
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00NN 37/000
Night Jewels 4
Dulux



