#0B3363
Closest named color: Marine (#042E60). oklch(32.4% 0.095 255.8), rgb(11, 51, 99).
Aa
White text reads best on this color (12.59:1).
About this color
#0B3363 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.095 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.017 away. White text reads best on it, at 12.59:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.66:1 |
| White text | 12.59:1 |
Values
| HEX | #0B3363 |
| RGB | rgb(11, 51, 99) |
| HSL | hsl(213, 80%, 22%) |
| OKLCH | oklch(32.4% 0.095 255.8) |
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 #0B3363 | 12.59:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #0B3363 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #0B3363 text on white | 12.59:1 | AAA | Lc 98.2 | Preferred for body text |
| #0B3363 text on black | 1.66:1 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3EF
oklch(80.8% 0.072 255.7)
-
Step 400
400
#6FA3E7
oklch(70.7% 0.115 255.5)
-
Step 500
500
#488AE0
oklch(63.1% 0.147 256)
-
Step 600
600
#2772CE
oklch(55.6% 0.16 255.9)
-
Step 700
700
#195FB2
oklch(49.1% 0.148 255.8)
-
Step 800
800
#184E90
oklch(42.7% 0.122 255.8)
-
Step 900
900 (this color)
#0B3363
oklch(32.4% 0.095 255.8)
-
Step 950
950
#112743
oklch(27.1% 0.059 255.4)
#0B3363 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) | #193765 | 0.019 |
| Deuteranopia (no green cones) | #043062 | 0.011 |
| Tritanopia (no blue cones) | #003F46 | 0.073 |
| Achromatopsia (no color) | #333333 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3363
#0B3363
oklch(32.4% 0.095 255.8)
- #472E00
#472E00
oklch(32.3% 0.068 76.3)
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 #0B3363, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.017
- Marine Blue #01386A ΔE 0.018
- Prussian Blue #1D3557 ΔE 0.028
- Midnight Green #073B4C ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.055
- Twilight Blue #0A437A ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.065
- Gunmetal #293241 ΔE 0.066
Use #0B3363 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.