#040F0B
Closest named color: Almost Black (#070D0D). oklch(15.5% 0.02 170.8), rgb(4, 15, 11).
Aa
White text reads best on this color (19.47:1).
About this color
#040F0B is a very dark close to neutral grey. In OKLCH its lightness is 16%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.012 away. White text reads best on it, at 19.47:1.
| Hue family | Neutrals |
| Lightness | very dark (16%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.07:1 |
| White text | 19.47:1 |
Values
| HEX | #040F0B |
| RGB | rgb(4, 15, 11) |
| HSL | hsl(158, 58%, 4%) |
| OKLCH | oklch(15.5% 0.02 170.8) |
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 #040F0B | 19.47:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #040F0B | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #040F0B text on white | 19.47:1 | AAA | Lc 105.7 | Preferred for body text |
| #040F0B text on black | 1.07:1 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E6EBE9
oklch(93.6% 0.006 170.4)
-
Step 200
200
#D1DCD8
oklch(88.5% 0.013 172.3)
-
Step 300
300
#B2C6BE
oklch(80.9% 0.024 169.7)
-
Step 400
400
#8AA99D
oklch(70.8% 0.038 169.7)
-
Step 500
500
#6C9385
oklch(63% 0.048 170.6)
-
Step 600
600
#537E6F
oklch(55.7% 0.053 170.4)
-
Step 700
700
#436A5D
oklch(49.1% 0.049 171.2)
-
Step 800
800
#37564C
oklch(42.6% 0.04 172.1)
-
Step 900
900
#30473F
oklch(37.6% 0.032 170.9)
-
Step 950
950 (this color)
#040F0B
oklch(15.5% 0.02 170.8)
#040F0B 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) | #0E0E0B | 0.020 |
| Deuteranopia (no green cones) | #0C0C0B | 0.019 |
| Tritanopia (no blue cones) | #020F0E | 0.007 |
| Achromatopsia (no color) | #0D0D0D | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040F0B
#040F0B
oklch(15.5% 0.02 170.8)
- #13090D
#13090D
oklch(15.6% 0.019 353.8)
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 #040F0B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.012
- Rich Navy #001219 ΔE 0.028
- Very Dark Brown #1D0200 ΔE 0.070
- Rich Black #0D1B2A ΔE 0.073
- Dark Navy Blue #00022E ΔE 0.094
- Midnight #03012D ΔE 0.094
- Dark Navy #000435 ΔE 0.099
- Very Dark Blue #000133 ΔE 0.102
Use #040F0B 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.