#0A2C4E
Closest named color: Marine (#042E60). oklch(28.9% 0.073 252), rgb(10, 44, 78).
Aa
White text reads best on this color (14.15:1).
About this color
#0A2C4E is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.073 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.032 away. White text reads best on it, at 14.15:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.48:1 |
| White text | 14.15:1 |
Values
| HEX | #0A2C4E |
| RGB | rgb(10, 44, 78) |
| HSL | hsl(210, 77%, 17%) |
| OKLCH | oklch(28.9% 0.073 252) |
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 #0A2C4E | 14.15:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #0A2C4E | 1.48:1 | Fails | Lc 0.0 | Not readable |
| #0A2C4E text on white | 14.15:1 | AAA | Lc 100.6 | Preferred for body text |
| #0A2C4E text on black | 1.48:1 | 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
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C3DCF9
oklch(88.5% 0.048 252.2)
-
Step 300
300
#98C5F7
oklch(81% 0.086 251.5)
-
Step 400
400
#5BA4F4
oklch(70.6% 0.139 252.3)
-
Step 500
500
#1D8BF0
oklch(63.1% 0.177 252)
-
Step 600
600
#0074D0
oklch(55.6% 0.166 251.9)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900
#00427B
oklch(37.7% 0.113 252.1)
-
Step 950
950 (this color)
#0A2C4E
oklch(28.9% 0.073 252)
#0A2C4E 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) | #1C2E4F | 0.020 |
| Deuteranopia (no green cones) | #11284D | 0.013 |
| Tritanopia (no blue cones) | #003439 | 0.054 |
| Achromatopsia (no color) | #2B2B2B | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A2C4E
#0A2C4E
oklch(28.9% 0.073 252)
- #3E2500
#3E2500
oklch(28.9% 0.062 71.5)
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 #0A2C4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.046
- Gunmetal #293241 ΔE 0.051
- Midnight Green #073B4C ΔE 0.052
- Dark #1B2431 ΔE 0.055
- Marine Blue #01386A ΔE 0.058
Use #0A2C4E 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.