#040B13
Closest named color: Almost Black (#070D0D). oklch(14.6% 0.022 247.8), rgb(4, 11, 19).
Aa
White text reads best on this color (19.76:1).
About this color
#040B13 is a very dark close to neutral grey. In OKLCH its lightness is 15%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.019 away. White text reads best on it, at 19.76:1.
| Hue family | Neutrals |
| Lightness | very dark (15%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.06:1 |
| White text | 19.76:1 |
Values
| HEX | #040B13 |
| RGB | rgb(4, 11, 19) |
| HSL | hsl(212, 65%, 5%) |
| OKLCH | oklch(14.6% 0.022 247.8) |
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 #040B13 | 19.76:1 | AAA | Lc -107.7 | Preferred for body text |
| Black text on #040B13 | 1.06:1 | Fails | Lc 0.0 | Not readable |
| #040B13 text on white | 19.76:1 | AAA | Lc 105.8 | Preferred for body text |
| #040B13 text on black | 1.06:1 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C3D1
oklch(81% 0.026 246.3)
-
Step 400
400
#8DA3BA
oklch(70.6% 0.042 249.6)
-
Step 500
500
#708DA9
oklch(63.2% 0.054 247.8)
-
Step 600
600
#587794
oklch(55.7% 0.058 247.2)
-
Step 700
700
#48647E
oklch(49.2% 0.053 247.1)
-
Step 800
800
#3B5166
oklch(42.6% 0.044 247.7)
-
Step 900
900
#334353
oklch(37.6% 0.034 248.8)
-
Step 950
950 (this color)
#040B13
oklch(14.6% 0.022 247.8)
#040B13 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) | #080B13 | 0.009 |
| Deuteranopia (no green cones) | #060A13 | 0.006 |
| Tritanopia (no blue cones) | #000D0E | 0.019 |
| Achromatopsia (no color) | #0A0A0A | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040B13
#040B13
oklch(14.6% 0.022 247.8)
- #100803
#100803
oklch(14.4% 0.02 62.1)
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 #040B13, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.019
- Rich Navy #001219 ΔE 0.028
- Midnight #03012D ΔE 0.068
- Dark Navy Blue #00022E ΔE 0.069
- Rich Black #0D1B2A ΔE 0.073
- Very Dark Brown #1D0200 ΔE 0.073
- Dark Navy #000435 ΔE 0.076
- Very Dark Blue #000133 ΔE 0.078
Use #040B13 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.