#0B3078
Closest named color: Marine Blue (#01386A). oklch(33.5% 0.13 261.9), rgb(11, 48, 120).
Aa
White text reads best on this color (12.29:1).
About this color
#0B3078 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.130 and its hue 262°. 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 12.29:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.70:1 |
| White text | 12.29:1 |
Values
| HEX | #0B3078 |
| RGB | rgb(11, 48, 120) |
| HSL | hsl(220, 83%, 26%) |
| OKLCH | oklch(33.5% 0.13 261.9) |
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 #0B3078 | 12.29:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #0B3078 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #0B3078 text on white | 12.29:1 | AAA | Lc 97.4 | Preferred for body text |
| #0B3078 text on black | 1.70:1 | 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4182FF
oklch(63.1% 0.198 261.8)
-
Step 600
600
#2167EF
oklch(55.6% 0.216 261.9)
-
Step 700
700
#1454D0
oklch(49% 0.202 261.9)
-
Step 800
800
#1346A8
oklch(42.7% 0.167 261.8)
-
Step 900
900 (this color)
#0B3078
oklch(33.5% 0.13 261.9)
-
Step 950
950
#0E244E
oklch(27% 0.082 261.8)
#0B3078 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) | #003A7A | 0.027 |
| Deuteranopia (no green cones) | #003077 | 0.007 |
| Tritanopia (no blue cones) | #00424F | 0.098 |
| Achromatopsia (no color) | #353535 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3078
#0B3078
oklch(33.5% 0.13 261.9)
- #483200
#483200
oklch(33.4% 0.069 81.7)
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 #0B3078, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.035
- Marine #042E60 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.054
- Midnight Blue #191970 ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.063
- Royal #0C1793 ΔE 0.065
- Cobalt #1E488F ΔE 0.079
- Dark Blue #00008B ΔE 0.084
Use #0B3078 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.