#040B24
Closest named color: Rich Navy (#001219). oklch(16% 0.054 266.1), rgb(4, 11, 36).
Aa
White text reads best on this color (19.47:1).
About this color
#040B24 is a very dark, muted blue. In OKLCH its lightness is 16%, its chroma 0.054 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.039 away. White text reads best on it, at 19.47:1.
| Hue family | Blues |
| Lightness | very dark (16%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.07:1 |
| White text | 19.47:1 |
Values
| HEX | #040B24 |
| RGB | rgb(4, 11, 36) |
| HSL | hsl(227, 80%, 8%) |
| OKLCH | oklch(16% 0.054 266.1) |
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 #040B24 | 19.47:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #040B24 | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #040B24 text on white | 19.47:1 | AAA | Lc 105.6 | Preferred for body text |
| #040B24 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ADC0EB
oklch(80.8% 0.065 266.3)
-
Step 400
400
#839FE1
oklch(70.7% 0.102 266.2)
-
Step 500
500
#6486D8
oklch(63.1% 0.13 265.8)
-
Step 600
600
#4C6EC5
oklch(55.6% 0.141 265.9)
-
Step 700
700
#3D5BAB
oklch(49% 0.133 266.2)
-
Step 800
800
#334B8A
oklch(42.7% 0.108 266.2)
-
Step 900
900
#2C3F6E
oklch(37.6% 0.084 265.9)
-
Step 950
950 (this color)
#040B24
oklch(16% 0.054 266.1)
#040B24 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) | #000E25 | 0.012 |
| Deuteranopia (no green cones) | #000B24 | 0.010 |
| Tritanopia (no blue cones) | #001115 | 0.044 |
| Achromatopsia (no color) | #0D0D0D | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040B24
#040B24
oklch(16% 0.054 266.1)
- #140C00
#140C00
oklch(16.1% 0.033 84.4)
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 #040B24, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.039
- Midnight #03012D ΔE 0.039
- Dark Navy Blue #00022E ΔE 0.040
- Dark Navy #000435 ΔE 0.042
- Very Dark Blue #000133 ΔE 0.046
- Almost Black #070D0D ΔE 0.052
- Rich Black #0D1B2A ΔE 0.061
- Navy Blue #001146 ΔE 0.070
Use #040B24 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.