#0B3864
Closest named color: Marine Blue (#01386A). oklch(33.7% 0.09 252.2), rgb(11, 56, 100).
Aa
White text reads best on this color (11.90:1).
About this color
#0B3864 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.090 and its hue 252°. 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 11.90:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.90:1 |
Values
| HEX | #0B3864 |
| RGB | rgb(11, 56, 100) |
| HSL | hsl(210, 80%, 22%) |
| OKLCH | oklch(33.7% 0.09 252.2) |
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 #0B3864 | 11.90:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #0B3864 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #0B3864 text on white | 11.90:1 | AAA | Lc 96.9 | Preferred for body text |
| #0B3864 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A1C4EC
oklch(80.9% 0.068 252)
-
Step 400
400
#6DA4E2
oklch(70.6% 0.108 252.3)
-
Step 500
500
#438CDA
oklch(63% 0.139 252.2)
-
Step 600
600
#1F75C8
oklch(55.7% 0.151 252.1)
-
Step 700
700
#0F62AD
oklch(49.2% 0.14 252)
-
Step 800
800
#12508C
oklch(42.7% 0.116 252.2)
-
Step 900
900 (this color)
#0B3864
oklch(33.7% 0.09 252.2)
-
Step 950
950
#0F2741
oklch(26.8% 0.057 252.3)
#0B3864 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) | #223B66 | 0.024 |
| Deuteranopia (no green cones) | #123363 | 0.015 |
| Tritanopia (no blue cones) | #004349 | 0.068 |
| Achromatopsia (no color) | #373737 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3864
#0B3864
oklch(33.7% 0.09 252.2)
- #4E3000
#4E3000
oklch(33.8% 0.072 71.9)
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 #0B3864, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.011
- Prussian Blue #1D3557 ΔE 0.026
- Marine #042E60 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.047
- Midnight Green #073B4C ΔE 0.047
- Twilight Blue #0A437A ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.061
- Gunmetal #293241 ΔE 0.065
Use #0B3864 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.