RAL Classic Black blue RAL 5004
| Code: | RAL 5004 |
| Name: | Black blue |
| Brand: | RAL Classic |
What color is RAL Classic Black blue?
Let’s dive into a full Black blue paint color review. Take a look at pictures of real interiors and exteriors painted with beautiful RAL 5004. Find out if this gorgeous cold blue paint color would look great on your living room walls or trims, kitchen cabinet, bedroom accent wall, bathroom or house exterior.
RAL Classic RAL 5004 on kitchen cabinets
Want a stylish kitchen? View real-life photo examples of this fascinating cool blue hue is paired with backsplashes, countertops, and hardware.

Black blue for exterior (4 photos)
Looking for a fresh new look for your house exterior or starting from skretch? We’ve collected pictures of real-life homes that have been painted with this cool blue hue. Find inspiration for your house’s exterior, front doors, gates, shutters, frames or windows.




RAL Classic Black blue reviews (4 photos)
View the photos of real spaces painted with this blue that were not included in specific categories.Close-ups, painted furniture, storages and dressers, hallways, stairs and ceilings.




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What are RAL Classic Black blue undertones?
Black blue has a clear blue undertone based on its position in the color space. We identify undertones by isolating the pure hue (separating it from lightness and saturation), which avoids distortions caused by tints, tones, and shades.
This method is generally more reliable than judging undertones on a white background.
HEX value:
#191E28
RGB code:
25, 30, 40
Is RAL Classic Black blue RAL 5004 cool or warm?
With a hue of 220°, this dark blue reads cool based on its HSL hue position.
RAL 5004 Black blue HSL code: 220, 23%, 13%
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 Black blue
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 (Kelvins).
Use the slider to see how this dark blue shade looks under different lighting:


4000K
Coordinating colors.
Colors that go with RAL Classic Black blue:
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 Black blue with a blue hue, complementary colors are those with a orange hue close to 40, such as RAL Classic Beige grey and Pearl beige.
LRV of Black blue
Black blue has an LRV of 4.62% and refers to Dark colors which means that this color almost does not reflect 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 4.62%, 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. To copy the code, just click the icon to the right of it.
| Format | Code | |
|---|---|---|
| HEX | #191E28 | |
| RGB Decimal | 25, 30, 40 | |
| RGB Percent | 9.80%, 11.76%, 15.69% | |
| HSV | Hue: 220° Saturation: 37.5% Value: 15.69% | |
| HSL | hsl(220, 23, 13) | |
| CMYK | Cyan: 37.5 Magenta: 25.0 Yellow: 0.0 Key: 84.31 | |
| YIQ | Y: 29.645 I: -6.193 Q: 2.054 | |
| XYZ | X: 1.248 Y: 1.288 Z: 2.19 | |
| CIE Lab | L:11.194 a:0.745 b:-7.503 | |
| CIE Luv | L:11.194 u:-2.026 v:-5.987 | |
| Decimal | 1646120 | |
| Hunter Lab | 11.351, -0.237, -3.493 |
Color equivalents
RAL 790-6
RAL Effect

RAL 790-5
RAL Effect

RAL 5011
Steel blue
RAL Classic

RAL 9011
Graphite black
RAL Classic

RAL 620-6
RAL Effect

RAL 8022
Black brown
RAL Classic

RAL 9017
Traffic black
RAL Classic

RAL 9005
Jet black
RAL Classic

RAL 9004
Signal black
RAL Classic

RAL 790-4
RAL Effect

RAL 7021
Black grey
RAL Classic

RAL 790-M
RAL Effect

RAL 790-3
RAL Effect

RAL 630-M
RAL Effect

