#040B15
Closest named color: Almost Black (#070D0D). oklch(14.7% 0.026 253.1), rgb(4, 11, 21).
Aa
White text reads best on this color (19.73:1).
About this color
#040B15 is a very dark close to neutral grey. In OKLCH its lightness is 15%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.022 away. White text reads best on it, at 19.73:1.
| Hue family | Neutrals |
| Lightness | very dark (15%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.06:1 |
| White text | 19.73:1 |
Values
| HEX | #040B15 |
| RGB | rgb(4, 11, 21) |
| HSL | hsl(215, 68%, 5%) |
| OKLCH | oklch(14.7% 0.026 253.1) |
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 #040B15 | 19.73:1 | AAA | Lc -107.7 | Preferred for body text |
| Black text on #040B15 | 1.06:1 | Fails | Lc 0.0 | Not readable |
| #040B15 text on white | 19.73:1 | AAA | Lc 105.8 | Preferred for body text |
| #040B15 text on black | 1.06:1 | 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
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B3C2D4
oklch(80.8% 0.03 253)
-
Step 400
400
#8CA3BF
oklch(70.7% 0.049 253.5)
-
Step 500
500
#6F8CAF
oklch(63.1% 0.062 253.4)
-
Step 600
600
#57769A
oklch(55.7% 0.067 252.7)
-
Step 700
700
#476384
oklch(49.2% 0.063 253.1)
-
Step 800
800
#3B516B
oklch(42.8% 0.051 253.1)
-
Step 900
900
#324357
oklch(37.7% 0.041 252.9)
-
Step 950
950 (this color)
#040B15
oklch(14.7% 0.026 253.1)
#040B15 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) | #070C15 | 0.008 |
| Deuteranopia (no green cones) | #050A15 | 0.004 |
| Tritanopia (no blue cones) | #000D0F | 0.021 |
| Achromatopsia (no color) | #0B0B0B | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040B15
#040B15
oklch(14.7% 0.026 253.1)
- #110901
#110901
oklch(14.8% 0.027 76.8)
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 #040B15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.022
- Rich Navy #001219 ΔE 0.027
- Midnight #03012D ΔE 0.064
- Dark Navy Blue #00022E ΔE 0.065
- Rich Black #0D1B2A ΔE 0.071
- Dark Navy #000435 ΔE 0.072
- Very Dark Blue #000133 ΔE 0.074
- Very Dark Brown #1D0200 ΔE 0.076
Use #040B15 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.