#042C4C
Closest named color: Marine (#042E60). oklch(28.6% 0.072 248.1), rgb(4, 44, 76).
Aa
White text reads best on this color (14.28:1).
About this color
#042C4C is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.072 and its hue 248°. 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 14.28:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.46:1 |
| White text | 14.28:1 |
Values
| HEX | #042C4C |
| RGB | rgb(4, 44, 76) |
| HSL | hsl(207, 90%, 16%) |
| OKLCH | oklch(28.6% 0.072 248.1) |
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 #042C4C | 14.28:1 | AAA | Lc -103.7 | Preferred for body text |
| Black text on #042C4C | 1.46:1 | Fails | Lc 0.0 | Not readable |
| #042C4C text on white | 14.28:1 | AAA | Lc 100.7 | Preferred for body text |
| #042C4C text on black | 1.46:1 | 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
#DDECFA
oklch(93.6% 0.025 246.2)
-
Step 200
200
#C1DDF8
oklch(88.6% 0.048 247.4)
-
Step 300
300
#95C6F6
oklch(80.9% 0.086 248.4)
-
Step 400
400
#53A6F1
oklch(70.6% 0.137 248.2)
-
Step 500
500
#008EEA
oklch(63.2% 0.17 248)
-
Step 600
600
#0077C6
oklch(55.6% 0.15 248.2)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950 (this color)
#042C4C
oklch(28.6% 0.072 248.1)
#042C4C 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) | #1C2E4D | 0.025 |
| Deuteranopia (no green cones) | #11274B | 0.017 |
| Tritanopia (no blue cones) | #003438 | 0.052 |
| Achromatopsia (no color) | #2A2A2A | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042C4C
#042C4C
oklch(28.6% 0.072 248.1)
- #3E2300
#3E2300
oklch(28.5% 0.063 67.8)
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 #042C4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.036
- Oxford Blue #1B263B ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.049
- Midnight Green #073B4C ΔE 0.052
- Gunmetal #293241 ΔE 0.053
- Dark #1B2431 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.060
Use #042C4C 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.