#0D366E
Closest named color: Marine Blue (#01386A). oklch(34% 0.107 257.7), rgb(13, 54, 110).
Aa
White text reads best on this color (11.86:1).
About this color
#0D366E is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.107 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.011 away. White text reads best on it, at 11.86:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.86:1 |
Values
| HEX | #0D366E |
| RGB | rgb(13, 54, 110) |
| HSL | hsl(215, 79%, 24%) |
| OKLCH | oklch(34% 0.107 257.7) |
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 #0D366E | 11.86:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #0D366E | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #0D366E text on white | 11.86:1 | AAA | Lc 96.8 | Preferred for body text |
| #0D366E text on black | 1.76:1 | 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
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A0C3F5
oklch(80.9% 0.081 257.3)
-
Step 400
400
#6CA2F0
oklch(70.8% 0.129 257.6)
-
Step 500
500
#4388EB
oklch(63.1% 0.165 257.8)
-
Step 600
600
#216FD9
oklch(55.6% 0.179 257.8)
-
Step 700
700
#135CBC
oklch(49% 0.166 257.9)
-
Step 800
800
#134C98
oklch(42.7% 0.137 257.6)
-
Step 900
900 (this color)
#0D366E
oklch(34% 0.107 257.7)
-
Step 950
950
#0F2647
oklch(27% 0.068 257.7)
#0D366E 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) | #153C70 | 0.020 |
| Deuteranopia (no green cones) | #00336D | 0.013 |
| Tritanopia (no blue cones) | #00444C | 0.083 |
| Achromatopsia (no color) | #373737 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D366E
#0D366E
oklch(34% 0.107 257.7)
- #4C3200
#4C3200
oklch(33.9% 0.071 77.1)
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 #0D366E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.011
- Marine #042E60 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.041
- Twilight Blue #0A437A ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.065
- Midnight Green #073B4C ΔE 0.066
- Midnight Blue #191970 ΔE 0.072
- Dark Grey Blue #29465B ΔE 0.073
Use #0D366E 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.