#040A03
Closest named color: Almost Black (#070D0D). oklch(13.3% 0.023 139.6), rgb(4, 10, 3).
Aa
White text reads best on this color (20.00:1).
About this color
#040A03 is a very dark close to neutral grey. In OKLCH its lightness is 13%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.027 away. White text reads best on it, at 20.00:1.
| Hue family | Neutrals |
| Lightness | very dark (13%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.04:1 |
| White text | 20.00:1 |
Values
| HEX | #040A03 |
| RGB | rgb(4, 10, 3) |
| HSL | hsl(111, 54%, 3%) |
| OKLCH | oklch(13.3% 0.023 139.6) |
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 #040A03 | 20.00:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #040A03 | 1.04:1 | Fails | Lc 0.0 | Not readable |
| #040A03 text on white | 20.00:1 | AAA | Lc 105.9 | Preferred for body text |
| #040A03 text on black | 1.04:1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E7EBE6
oklch(93.6% 0.008 139.4)
-
Step 200
200
#D4DCD2
oklch(88.6% 0.016 139.4)
-
Step 300
300
#B8C5B4
oklch(80.9% 0.027 138.3)
-
Step 400
400
#93A88E
oklch(70.8% 0.044 139.7)
-
Step 500
500
#789271
oklch(63% 0.057 139.1)
-
Step 600
600
#607C5A
oklch(55.5% 0.061 140.1)
-
Step 700
700
#50694A
oklch(49.2% 0.057 139.6)
-
Step 800
800
#41563D
oklch(42.8% 0.048 140.6)
-
Step 900
900
#374734
oklch(37.8% 0.038 140.6)
-
Step 950
950 (this color)
#040A03
oklch(13.3% 0.023 139.6)
#040A03 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) | #0B0903 | 0.017 |
| Deuteranopia (no green cones) | #090803 | 0.015 |
| Tritanopia (no blue cones) | #040908 | 0.017 |
| Achromatopsia (no color) | #080808 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040A03
#040A03
oklch(13.3% 0.023 139.6)
- #0C050E
#0C050E
oklch(13.3% 0.025 319.5)
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 #040A03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.027
- Rich Navy #001219 ΔE 0.051
- Very Dark Brown #1D0200 ΔE 0.067
- Rich Black #0D1B2A ΔE 0.098
- Midnight #03012D ΔE 0.105
- Dark Navy Blue #00022E ΔE 0.105
- Dark Navy #000435 ΔE 0.114
- Very Dark Blue #000133 ΔE 0.114
Use #040A03 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.