#0B347C
Closest named color: Marine Blue (#01386A). oklch(34.7% 0.13 261), rgb(11, 52, 124).
Aa
White text reads best on this color (11.68:1).
About this color
#0B347C is a dark, moderately saturated blue. In OKLCH its lightness is 35%, 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 0.035 away. White text reads best on it, at 11.68:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.79:1 |
| White text | 11.68:1 |
Values
| HEX | #0B347C |
| RGB | rgb(11, 52, 124) |
| HSL | hsl(218, 84%, 26%) |
| OKLCH | oklch(34.7% 0.13 261) |
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 #0B347C | 11.68:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #0B347C | 1.79:1 | Fails | Lc 7.6 | Not readable |
| #0B347C text on white | 11.68:1 | AAA | Lc 96.3 | Preferred for body text |
| #0B347C text on black | 1.79:1 | 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
#9EC2FF
oklch(81% 0.095 260.8)
-
Step 400
400
#689FFF
oklch(70.7% 0.153 260.8)
-
Step 500
500
#3D83FF
oklch(63.2% 0.198 260.8)
-
Step 600
600
#1968EF
oklch(55.7% 0.216 260.9)
-
Step 700
700
#0A55D0
oklch(49.1% 0.202 260.9)
-
Step 800
800
#0E46A8
oklch(42.6% 0.167 261.1)
-
Step 900
900 (this color)
#0B347C
oklch(34.7% 0.13 261)
-
Step 950
950
#0D244E
oklch(27% 0.083 261.2)
#0B347C 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) | #003D7E | 0.024 |
| Deuteranopia (no green cones) | #00337B | 0.008 |
| Tritanopia (no blue cones) | #004652 | 0.100 |
| Achromatopsia (no color) | #383838 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B347C
#0B347C
oklch(34.7% 0.13 261)
- #4D3500
#4D3500
oklch(34.8% 0.072 80.6)
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 #0B347C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.035
- Twilight Blue #0A437A ΔE 0.044
- Marine #042E60 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.066
- Midnight Blue #191970 ΔE 0.067
- Cobalt #1E488F ΔE 0.067
- Royal #0C1793 ΔE 0.068
- Sapphire #2138AB ΔE 0.083
Use #0B347C 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.