#040F34
Closest named color: Dark Navy (#000435). oklch(18.8% 0.075 265.2), rgb(4, 15, 52).
Aa
White text reads best on this color (18.69:1).
About this color
#040F34 is a very dark, moderately saturated blue. In OKLCH its lightness is 19%, its chroma 0.075 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Navy (#000435), ΔE 0.035 away. White text reads best on it, at 18.69:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Navy (#000435) |
| Black text | 1.12:1 |
| White text | 18.69:1 |
Values
| HEX | #040F34 |
| RGB | rgb(4, 15, 52) |
| HSL | hsl(226, 86%, 11%) |
| OKLCH | oklch(18.8% 0.075 265.2) |
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 #040F34 | 18.69:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #040F34 | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #040F34 text on white | 18.69:1 | AAA | Lc 105.0 | Preferred for body text |
| #040F34 text on black | 1.12:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#C9D9FB
oklch(88.4% 0.05 265.4)
-
Step 300
300
#A5C0FB
oklch(80.9% 0.089 265.4)
-
Step 400
400
#759DF9
oklch(70.7% 0.142 265.2)
-
Step 500
500
#5381F6
oklch(63.1% 0.182 265.4)
-
Step 600
600
#3967E5
oklch(55.6% 0.198 265.2)
-
Step 700
700
#2C55C7
oklch(49.1% 0.184 265.1)
-
Step 800
800
#2546A1
oklch(42.7% 0.153 265.3)
-
Step 900
900
#223C80
oklch(37.7% 0.119 265.3)
-
Step 950
950 (this color)
#040F34
oklch(18.8% 0.075 265.2)
#040F34 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) | #001535 | 0.018 |
| Deuteranopia (no green cones) | #001033 | 0.008 |
| Tritanopia (no blue cones) | #00181F | 0.057 |
| Achromatopsia (no color) | #121212 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040F34
#040F34
oklch(18.8% 0.075 265.2)
- #1B1200
#1B1200
oklch(18.9% 0.039 86.5)
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 #040F34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Navy #000435 ΔE 0.035
- Navy Blue #001146 ΔE 0.036
- Night Blue #040348 ΔE 0.045
- Very Dark Blue #000133 ΔE 0.046
- Dark Navy Blue #00022E ΔE 0.047
- Midnight #03012D ΔE 0.048
- Rich Black #0D1B2A ΔE 0.051
- Rich Navy #001219 ΔE 0.059
Use #040F34 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.