#040B2E
Closest named color: Dark Navy (#000435). oklch(17.1% 0.071 267.4), rgb(4, 11, 46).
Aa
White text reads best on this color (19.22:1).
About this color
#040B2E is a very dark, moderately saturated blue. In OKLCH its lightness is 17%, its chroma 0.071 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Navy (#000435), ΔE 0.027 away. White text reads best on it, at 19.22:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dark Navy (#000435) |
| Black text | 1.09:1 |
| White text | 19.22:1 |
Values
| HEX | #040B2E |
| RGB | rgb(4, 11, 46) |
| HSL | hsl(230, 84%, 10%) |
| OKLCH | oklch(17.1% 0.071 267.4) |
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 #040B2E | 19.22:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #040B2E | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #040B2E text on white | 19.22:1 | AAA | Lc 105.3 | Preferred for body text |
| #040B2E text on black | 1.09:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A9BFF8
oklch(80.8% 0.085 268.1)
-
Step 400
400
#7B9CF5
oklch(70.6% 0.136 267.5)
-
Step 500
500
#5B81F0
oklch(63.1% 0.172 267.2)
-
Step 600
600
#4367DF
oklch(55.5% 0.187 267.4)
-
Step 700
700
#3655C2
oklch(49.2% 0.174 267.5)
-
Step 800
800
#2C469D
oklch(42.7% 0.145 267.3)
-
Step 900
900
#273C7C
oklch(37.6% 0.112 267.2)
-
Step 950
950 (this color)
#040B2E
oklch(17.1% 0.071 267.4)
#040B2E 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) | #00112F | 0.018 |
| Deuteranopia (no green cones) | #000D2D | 0.009 |
| Tritanopia (no blue cones) | #00141A | 0.056 |
| Achromatopsia (no color) | #0F0F0F | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040B2E
#040B2E
oklch(17.1% 0.071 267.4)
- #160E00
#160E00
oklch(17% 0.035 86.2)
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 #040B2E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Navy #000435 ΔE 0.027
- Midnight #03012D ΔE 0.034
- Dark Navy Blue #00022E ΔE 0.034
- Very Dark Blue #000133 ΔE 0.036
- Navy Blue #001146 ΔE 0.050
- Night Blue #040348 ΔE 0.052
- Rich Navy #001219 ΔE 0.054
- Rich Black #0D1B2A ΔE 0.060
Use #040B2E 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.