#040309
Closest named color: Almost Black (#070D0D). oklch(10.5% 0.02 292.8), rgb(4, 3, 9).
Aa
White text reads best on this color (20.54:1).
About this color
#040309 is a very dark close to neutral grey. In OKLCH its lightness is 11%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.053 away. White text reads best on it, at 20.54:1.
| Hue family | Neutrals |
| Lightness | very dark (11%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.02:1 |
| White text | 20.54:1 |
Values
| HEX | #040309 |
| RGB | rgb(4, 3, 9) |
| HSL | hsl(250, 50%, 2%) |
| OKLCH | oklch(10.5% 0.02 292.8) |
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 #040309 | 20.54:1 | AAA | Lc -107.9 | Preferred for body text |
| Black text on #040309 | 1.02:1 | Fails | Lc 0.0 | Not readable |
| #040309 text on white | 20.54:1 | AAA | Lc 106.0 | Preferred for body text |
| #040309 text on black | 1.02:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#D9D8E1
oklch(88.6% 0.012 291.3)
-
Step 300
300
#C1BECF
oklch(80.9% 0.024 294)
-
Step 400
400
#A19DB6
oklch(70.8% 0.036 292.8)
-
Step 500
500
#8A85A4
oklch(63.2% 0.046 292.4)
-
Step 600
600
#746E8F
oklch(55.6% 0.051 293)
-
Step 700
700
#615C7A
oklch(49.1% 0.048 292.2)
-
Step 800
800
#4F4B63
oklch(42.6% 0.04 292.3)
-
Step 900
900
#423F51
oklch(37.8% 0.031 292.5)
-
Step 950
950 (this color)
#040309
oklch(10.5% 0.02 292.8)
#040309 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) | #020409 | 0.011 |
| Deuteranopia (no green cones) | #020409 | 0.011 |
| Tritanopia (no blue cones) | #030405 | 0.017 |
| Achromatopsia (no color) | #040404 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040309
#040309
oklch(10.5% 0.02 292.8)
- #040400
#040400
oklch(10.3% 0.023 109.8)
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 #040309, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.053
- Rich Navy #001219 ΔE 0.071
- Very Dark Brown #1D0200 ΔE 0.076
- Midnight #03012D ΔE 0.079
- Dark Navy Blue #00022E ΔE 0.082
- Very Dark Blue #000133 ΔE 0.092
- Dark Navy #000435 ΔE 0.096
- Black #000000 ΔE 0.107
Use #040309 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.