#040A13
Closest named color: Almost Black (#070D0D). oklch(14.2% 0.023 253.4), rgb(4, 10, 19).
Aa
White text reads best on this color (19.84:1).
About this color
#040A13 is a very dark close to neutral grey. In OKLCH its lightness is 14%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.022 away. White text reads best on it, at 19.84:1.
| Hue family | Neutrals |
| Lightness | very dark (14%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.05:1 |
| White text | 19.84:1 |
Values
| HEX | #040A13 |
| RGB | rgb(4, 10, 19) |
| HSL | hsl(216, 65%, 5%) |
| OKLCH | oklch(14.2% 0.023 253.4) |
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 #040A13 | 19.84:1 | AAA | Lc -107.7 | Preferred for body text |
| Black text on #040A13 | 1.05:1 | Fails | Lc 0.0 | Not readable |
| #040A13 text on white | 19.84:1 | AAA | Lc 105.8 | Preferred for body text |
| #040A13 text on black | 1.05:1 | 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
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B5C2D2
oklch(80.9% 0.027 253.6)
-
Step 400
400
#8EA3BC
oklch(70.8% 0.044 252.9)
-
Step 500
500
#728CAB
oklch(63.1% 0.056 253.1)
-
Step 600
600
#5A7697
oklch(55.7% 0.061 253)
-
Step 700
700
#4A6381
oklch(49.2% 0.057 253.4)
-
Step 800
800
#3D5168
oklch(42.8% 0.046 252.4)
-
Step 900
900
#344355
oklch(37.7% 0.037 253.3)
-
Step 950
950 (this color)
#040A13
oklch(14.2% 0.023 253.4)
#040A13 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) | #070A13 | 0.007 |
| Deuteranopia (no green cones) | #050913 | 0.005 |
| Tritanopia (no blue cones) | #000C0D | 0.021 |
| Achromatopsia (no color) | #0A0A0A | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040A13
#040A13
oklch(14.2% 0.023 253.4)
- #0F0802
#0F0802
oklch(14.2% 0.022 72.6)
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 #040A13, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.022
- Rich Navy #001219 ΔE 0.031
- Midnight #03012D ΔE 0.066
- Dark Navy Blue #00022E ΔE 0.067
- Very Dark Brown #1D0200 ΔE 0.074
- Dark Navy #000435 ΔE 0.075
- Very Dark Blue #000133 ΔE 0.076
- Rich Black #0D1B2A ΔE 0.076
Use #040A13 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.