#0A356E
Closest named color: Marine Blue (#01386A). oklch(33.7% 0.109 257.6), rgb(10, 53, 110).
Aa
White text reads best on this color (12.01:1).
About this color
#0A356E is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.109 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.012 away. White text reads best on it, at 12.01:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.01:1 |
Values
| HEX | #0A356E |
| RGB | rgb(10, 53, 110) |
| HSL | hsl(214, 83%, 24%) |
| OKLCH | oklch(33.7% 0.109 257.6) |
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 #0A356E | 12.01:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #0A356E | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #0A356E text on white | 12.01:1 | AAA | Lc 97.0 | Preferred for body text |
| #0A356E text on black | 1.74:1 | 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 900.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#A0C3F6
oklch(81% 0.082 257.7)
-
Step 400
400
#6BA2F1
oklch(70.8% 0.13 257.5)
-
Step 500
500
#4188EC
oklch(63.1% 0.167 257.5)
-
Step 600
600
#1D6FDB
oklch(55.6% 0.182 257.6)
-
Step 700
700
#0E5CBE
oklch(49.1% 0.169 257.6)
-
Step 800
800
#114C9A
oklch(42.8% 0.14 257.6)
-
Step 900
900 (this color)
#0A356E
oklch(33.7% 0.109 257.6)
-
Step 950
950
#0E2647
oklch(27% 0.068 257.1)
#0A356E 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) | #123B70 | 0.020 |
| Deuteranopia (no green cones) | #00326D | 0.012 |
| Tritanopia (no blue cones) | #00434C | 0.083 |
| Achromatopsia (no color) | #363636 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A356E
#0A356E
oklch(33.7% 0.109 257.6)
- #4B3200
#4B3200
oklch(33.8% 0.07 78.2)
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 #0A356E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.012
- Marine #042E60 ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.067
- Midnight Green #073B4C ΔE 0.067
- Midnight Blue #191970 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.076
Use #0A356E 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.