#04181B
Closest named color: Rich Navy (#001219). oklch(19.4% 0.027 208), rgb(4, 24, 27).
Aa
White text reads best on this color (18.23:1).
About this color
#04181B is a very dark close to neutral grey. In OKLCH its lightness is 19%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.026 away. White text reads best on it, at 18.23:1.
| Hue family | Neutrals |
| Lightness | very dark (19%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.15:1 |
| White text | 18.23:1 |
Values
| HEX | #04181B |
| RGB | rgb(4, 24, 27) |
| HSL | hsl(188, 74%, 6%) |
| OKLCH | oklch(19.4% 0.027 208) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #04181B | 18.23:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #04181B | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #04181B text on white | 18.23:1 | AAA | Lc 104.8 | Preferred for body text |
| #04181B text on black | 1.15:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDDF
oklch(88.5% 0.018 205.3)
-
Step 300
300
#A9C7CB
oklch(80.9% 0.033 206.4)
-
Step 400
400
#7AAAB1
oklch(70.6% 0.052 207.3)
-
Step 500
500
#56959E
oklch(63.1% 0.066 207.4)
-
Step 600
600
#387F89
oklch(55.5% 0.072 207.7)
-
Step 700
700
#2A6B75
oklch(49.1% 0.067 209.1)
-
Step 800
800
#24575F
oklch(42.6% 0.056 209.1)
-
Step 900
900
#23484E
oklch(37.7% 0.043 209.1)
-
Step 950
950 (this color)
#04181B
oklch(19.4% 0.027 208)
#04181B with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #15171B | 0.026 |
| Deuteranopia (no green cones) | #11141B | 0.024 |
| Tritanopia (no blue cones) | #001A19 | 0.011 |
| Achromatopsia (no color) | #151515 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04181B
#04181B
oklch(19.4% 0.027 208)
- #20100E
#20100E
oklch(19.5% 0.028 27.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #04181B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.026
- Rich Black #0D1B2A ΔE 0.034
- Almost Black #070D0D ΔE 0.045
- Dark #1B2431 ΔE 0.068
- Jet #212529 ΔE 0.072
- Oxford Blue #1B263B ΔE 0.083
- Dark Navy #000435 ΔE 0.090
- Navy Blue #001146 ΔE 0.091
Use #04181B in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.