#040D18
Closest named color: Rich Navy (#001219). oklch(15.6% 0.028 250.9), rgb(4, 13, 24).
Aa
White text reads best on this color (19.51:1).
About this color
#040D18 is a very dark close to neutral grey. In OKLCH its lightness is 16%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.020 away. White text reads best on it, at 19.51:1.
| Hue family | Neutrals |
| Lightness | very dark (16%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.07:1 |
| White text | 19.51:1 |
Values
| HEX | #040D18 |
| RGB | rgb(4, 13, 24) |
| HSL | hsl(213, 71%, 5%) |
| OKLCH | oklch(15.6% 0.028 250.9) |
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 #040D18 | 19.51:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #040D18 | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #040D18 text on white | 19.51:1 | AAA | Lc 105.7 | Preferred for body text |
| #040D18 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D0DAE5
oklch(88.4% 0.019 250.6)
-
Step 300
300
#B1C3D6
oklch(81% 0.033 249.7)
-
Step 400
400
#88A4C2
oklch(70.8% 0.054 250.4)
-
Step 500
500
#6A8DB2
oklch(63.1% 0.068 250.3)
-
Step 600
600
#51769E
oklch(55.5% 0.075 251.2)
-
Step 700
700
#426387
oklch(49% 0.07 251.4)
-
Step 800
800
#37516E
oklch(42.7% 0.058 251.9)
-
Step 900
900
#2F4359
oklch(37.6% 0.046 251.4)
-
Step 950
950 (this color)
#040D18
oklch(15.6% 0.028 250.9)
#040D18 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) | #080E18 | 0.010 |
| Deuteranopia (no green cones) | #060B18 | 0.008 |
| Tritanopia (no blue cones) | #001011 | 0.024 |
| Achromatopsia (no color) | #0C0C0C | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040D18
#040D18
oklch(15.6% 0.028 250.9)
- #140A01
#140A01
oklch(15.6% 0.03 72.2)
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 #040D18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.020
- Almost Black #070D0D ΔE 0.024
- Rich Black #0D1B2A ΔE 0.062
- Midnight #03012D ΔE 0.063
- Dark Navy Blue #00022E ΔE 0.064
- Dark Navy #000435 ΔE 0.068
- Very Dark Blue #000133 ΔE 0.072
- Very Dark Brown #1D0200 ΔE 0.079
Use #040D18 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.