#040F19
Closest named color: Rich Navy (#001219). oklch(16.3% 0.028 244.6), rgb(4, 15, 25).
Aa
White text reads best on this color (19.30:1).
About this color
#040F19 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 0.013 away. White text reads best on it, at 19.30:1.
| Hue family | Neutrals |
| Lightness | very dark (16%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.08:1 |
| White text | 19.30:1 |
Values
| HEX | #040F19 |
| RGB | rgb(4, 15, 25) |
| HSL | hsl(209, 72%, 6%) |
| OKLCH | oklch(16.3% 0.028 244.6) |
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 #040F19 | 19.30:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #040F19 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #040F19 text on white | 19.30:1 | AAA | Lc 105.5 | Preferred for body text |
| #040F19 text on black | 1.08:1 | 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
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#CFDBE5
oklch(88.5% 0.019 243)
-
Step 300
300
#B0C3D5
oklch(80.8% 0.033 246.8)
-
Step 400
400
#85A5C0
oklch(70.7% 0.053 244.1)
-
Step 500
500
#668EB0
oklch(63% 0.068 244.8)
-
Step 600
600
#4D789B
oklch(55.6% 0.073 244.2)
-
Step 700
700
#3E6585
oklch(49.2% 0.068 244.6)
-
Step 800
800
#33526C
oklch(42.6% 0.057 245)
-
Step 900
900
#2D4458
oklch(37.7% 0.045 245.6)
-
Step 950
950 (this color)
#040F19
oklch(16.3% 0.028 244.6)
#040F19 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) | #0B0F19 | 0.013 |
| Deuteranopia (no green cones) | #080D19 | 0.010 |
| Tritanopia (no blue cones) | #001112 | 0.021 |
| Achromatopsia (no color) | #0E0E0E | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040F19
#040F19
oklch(16.3% 0.028 244.6)
- #160B03
#160B03
oklch(16.3% 0.027 62.5)
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 #040F19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.013
- Almost Black #070D0D ΔE 0.025
- Rich Black #0D1B2A ΔE 0.055
- Dark Navy Blue #00022E ΔE 0.067
- Midnight #03012D ΔE 0.067
- Dark Navy #000435 ΔE 0.070
- Very Dark Blue #000133 ΔE 0.074
- Very Dark Brown #1D0200 ΔE 0.080
Use #040F19 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.