#042E4C
Closest named color: Marine (#042E60). oklch(29.1% 0.07 245.6), rgb(4, 46, 76).
Aa
White text reads best on this color (13.99:1).
About this color
#042E4C is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.070 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.036 away. White text reads best on it, at 13.99:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.50:1 |
| White text | 13.99:1 |
Values
| HEX | #042E4C |
| RGB | rgb(4, 46, 76) |
| HSL | hsl(205, 90%, 16%) |
| OKLCH | oklch(29.1% 0.07 245.6) |
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 #042E4C | 13.99:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #042E4C | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #042E4C text on white | 13.99:1 | AAA | Lc 100.3 | Preferred for body text |
| #042E4C text on black | 1.50:1 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DDECF9
oklch(93.6% 0.024 244.1)
-
Step 200
200
#C1DDF6
oklch(88.5% 0.046 245.3)
-
Step 300
300
#94C7F3
oklch(81% 0.082 245.1)
-
Step 400
400
#51A8EE
oklch(70.8% 0.133 245.6)
-
Step 500
500
#0090E3
oklch(63.2% 0.16 245.3)
-
Step 600
600
#0078C0
oklch(55.5% 0.142 245.8)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950 (this color)
#042E4C
oklch(29.1% 0.07 245.6)
#042E4C 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) | #202F4D | 0.028 |
| Deuteranopia (no green cones) | #15294B | 0.019 |
| Tritanopia (no blue cones) | #003539 | 0.048 |
| Achromatopsia (no color) | #2C2C2C | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042E4C
#042E4C
oklch(29.1% 0.07 245.6)
- #412400
#412400
oklch(29.2% 0.065 66.2)
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 #042E4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.039
- Midnight Green #073B4C ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.046
- Gunmetal #293241 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.053
- Dark #1B2431 ΔE 0.055
Use #042E4C 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.