#040348
Named color: Night Blue. oklch(19.1% 0.12 267.8), rgb(4, 3, 72).
Aa
White text reads best on this color (18.88:1).
About this color
#040348 is a very dark, moderately saturated blue. In OKLCH its lightness is 19%, its chroma 0.120 and its hue 268°. Its hue sits on the cool side of the wheel. It is the named color Night Blue. White text reads best on it, at 18.88:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Night Blue |
| Black text | 1.11:1 |
| White text | 18.88:1 |
Values
| HEX | #040348 |
| RGB | rgb(4, 3, 72) |
| HSL | hsl(241, 92%, 15%) |
| OKLCH | oklch(19.1% 0.12 267.8) |
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 #040348 | 18.88:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #040348 | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #040348 text on white | 18.88:1 | AAA | Lc 104.5 | Preferred for body text |
| #040348 text on black | 1.11:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#789BFF
oklch(70.8% 0.152 267.9)
-
Step 500
500
#567DFF
oklch(63% 0.198 267.8)
-
Step 600
600
#395BFF
oklch(55.6% 0.245 267.9)
-
Step 700
700
#2731FF
oklch(49% 0.287 267.8)
-
Step 800
800
#1F2BD0
oklch(42.7% 0.242 267.8)
-
Step 900
900
#1A2CA3
oklch(37.6% 0.189 267.8)
-
Step 950
950 (this color)
#040348
oklch(19.1% 0.12 267.8)
#040348 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) | #00154A | 0.039 |
| Deuteranopia (no green cones) | #000D47 | 0.019 |
| Tritanopia (no blue cones) | #001A27 | 0.090 |
| Achromatopsia (no color) | #111111 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040348
#040348
oklch(19.1% 0.12 267.8)
- #1B1300
#1B1300
oklch(19.2% 0.039 89.7)
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 #040348, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.028
- Dark Navy #000435 ΔE 0.040
- Very Dark Blue #000133 ΔE 0.048
- Dark Navy Blue #00022E ΔE 0.057
- Darkblue #030764 ΔE 0.057
- Midnight #03012D ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.062
- Dark Royal Blue #02066F ΔE 0.077
Use #040348 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.