#0B337B
Closest named color: Marine Blue (#01386A). oklch(34.4% 0.13 261.2), rgb(11, 51, 123).
Aa
White text reads best on this color (11.83:1).
About this color
#0B337B is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.130 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.034 away. White text reads best on it, at 11.83:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.77:1 |
| White text | 11.83:1 |
Values
| HEX | #0B337B |
| RGB | rgb(11, 51, 123) |
| HSL | hsl(219, 84%, 26%) |
| OKLCH | oklch(34.4% 0.13 261.2) |
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 #0B337B | 11.83:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #0B337B | 1.77:1 | Fails | Lc 7.3 | Not readable |
| #0B337B text on white | 11.83:1 | AAA | Lc 96.5 | Preferred for body text |
| #0B337B text on black | 1.77:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFE
oklch(88.4% 0.055 261.2)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699FFF
oklch(70.8% 0.152 261.1)
-
Step 500
500
#3E82FF
oklch(63% 0.199 261.3)
-
Step 600
600
#1B67EF
oklch(55.5% 0.217 261.2)
-
Step 700
700
#0D55D0
oklch(49.1% 0.201 261.1)
-
Step 800
800
#0F46A8
oklch(42.6% 0.167 261.2)
-
Step 900
900 (this color)
#0B337B
oklch(34.4% 0.13 261.2)
-
Step 950
950
#0D244E
oklch(27% 0.083 261.2)
#0B337B 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) | #003D7D | 0.027 |
| Deuteranopia (no green cones) | #00337A | 0.006 |
| Tritanopia (no blue cones) | #004551 | 0.100 |
| Achromatopsia (no color) | #373737 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B337B
#0B337B
oklch(34.4% 0.13 261.2)
- #4C3400
#4C3400
oklch(34.4% 0.071 80.2)
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 #0B337B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.034
- Twilight Blue #0A437A ΔE 0.046
- Marine #042E60 ΔE 0.049
- Midnight Blue #191970 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.065
- Royal #0C1793 ΔE 0.067
- Cobalt #1E488F ΔE 0.070
- Sapphire #2138AB ΔE 0.085
Use #0B337B 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.