#042C4E
Closest named color: Marine (#042E60). oklch(28.7% 0.075 249.5), rgb(4, 44, 78).
Aa
White text reads best on this color (14.23:1).
About this color
#042C4E is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.075 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.033 away. White text reads best on it, at 14.23:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.47:1 |
| White text | 14.23:1 |
Values
| HEX | #042C4E |
| RGB | rgb(4, 44, 78) |
| HSL | hsl(208, 90%, 16%) |
| OKLCH | oklch(28.7% 0.075 249.5) |
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 #042C4E | 14.23:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #042C4E | 1.47:1 | Fails | Lc 0.0 | Not readable |
| #042C4E text on white | 14.23:1 | AAA | Lc 100.6 | Preferred for body text |
| #042C4E text on black | 1.47:1 | 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
#DDECFB
oklch(93.6% 0.026 248.1)
-
Step 200
200
#C1DCF9
oklch(88.4% 0.049 250.3)
-
Step 300
300
#94C6F8
oklch(81% 0.088 249)
-
Step 400
400
#52A6F5
oklch(70.8% 0.142 249.3)
-
Step 500
500
#008DEE
oklch(63.2% 0.176 249.3)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950 (this color)
#042C4E
oklch(28.7% 0.075 249.5)
#042C4E 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) | #1B2E4F | 0.023 |
| Deuteranopia (no green cones) | #0F284D | 0.014 |
| Tritanopia (no blue cones) | #003439 | 0.053 |
| Achromatopsia (no color) | #2B2B2B | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042C4E
#042C4E
oklch(28.7% 0.075 249.5)
- #3E2400
#3E2400
oklch(28.7% 0.062 69.6)
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 #042C4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.033
- Oxford Blue #1B263B ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.050
- Midnight Green #073B4C ΔE 0.053
- Gunmetal #293241 ΔE 0.054
- Dark #1B2431 ΔE 0.056
- Marine Blue #01386A ΔE 0.058
Use #042C4E 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.