#040A0F
Closest named color: Almost Black (#070D0D). oklch(14% 0.016 238.2), rgb(4, 10, 15).
Aa
White text reads best on this color (19.89:1).
About this color
#040A0F is a very dark close to neutral grey. In OKLCH its lightness is 14%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.017 away. White text reads best on it, at 19.89:1.
| Hue family | Neutrals |
| Lightness | very dark (14%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.05:1 |
| White text | 19.89:1 |
Values
| HEX | #040A0F |
| RGB | rgb(4, 10, 15) |
| HSL | hsl(207, 58%, 4%) |
| OKLCH | oklch(14% 0.016 238.2) |
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 #040A0F | 19.89:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #040A0F | 1.05:1 | Fails | Lc 0.0 | Not readable |
| #040A0F text on white | 19.89:1 | AAA | Lc 105.9 | Preferred for body text |
| #040A0F 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B6C3CC
oklch(81% 0.019 237.8)
-
Step 400
400
#90A4B2
oklch(70.8% 0.03 238.4)
-
Step 500
500
#748D9F
oklch(63% 0.039 239.6)
-
Step 600
600
#5C778A
oklch(55.5% 0.043 239.2)
-
Step 700
700
#4C6475
oklch(49.1% 0.04 239.5)
-
Step 800
800
#3E525F
oklch(42.7% 0.033 237)
-
Step 900
900
#35444E
oklch(37.8% 0.026 237.6)
-
Step 950
950 (this color)
#040A0F
oklch(14% 0.016 238.2)
#040A0F 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) | #080A0F | 0.010 |
| Deuteranopia (no green cones) | #06090F | 0.006 |
| Tritanopia (no blue cones) | #010B0C | 0.013 |
| Achromatopsia (no color) | #090909 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040A0F
#040A0F
oklch(14% 0.016 238.2)
- #0E0804
#0E0804
oklch(14.1% 0.016 62.9)
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 #040A0F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.017
- Rich Navy #001219 ΔE 0.034
- Very Dark Brown #1D0200 ΔE 0.070
- Midnight #03012D ΔE 0.075
- Dark Navy Blue #00022E ΔE 0.076
- Rich Black #0D1B2A ΔE 0.080
- Dark Navy #000435 ΔE 0.084
- Very Dark Blue #000133 ΔE 0.085
Use #040A0F 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.