#0B385B
Closest named color: Prussian Blue (#1D3557). oklch(33.1% 0.078 247.1), rgb(11, 56, 91).
Aa
White text reads best on this color (12.13:1).
About this color
#0B385B is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.078 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 12.13:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.73:1 |
| White text | 12.13:1 |
Values
| HEX | #0B385B |
| RGB | rgb(11, 56, 91) |
| HSL | hsl(206, 78%, 20%) |
| OKLCH | oklch(33.1% 0.078 247.1) |
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 #0B385B | 12.13:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #0B385B | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #0B385B text on white | 12.13:1 | AAA | Lc 97.4 | Preferred for body text |
| #0B385B text on black | 1.73:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCEE
oklch(88.6% 0.032 246.7)
-
Step 300
300
#A3C5E5
oklch(80.9% 0.058 247)
-
Step 400
400
#70A6D8
oklch(70.7% 0.093 247.4)
-
Step 500
500
#478FCD
oklch(63.1% 0.118 247)
-
Step 600
600
#2378BA
oklch(55.6% 0.129 246.9)
-
Step 700
700
#1465A1
oklch(49.2% 0.12 247)
-
Step 800
800
#155282
oklch(42.6% 0.1 247.3)
-
Step 900
900 (this color)
#0B385B
oklch(33.1% 0.078 247.1)
-
Step 950
950
#10283D
oklch(26.9% 0.05 247.3)
#0B385B 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) | #273A5C | 0.029 |
| Deuteranopia (no green cones) | #1C325A | 0.021 |
| Tritanopia (no blue cones) | #004045 | 0.054 |
| Achromatopsia (no color) | #363636 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B385B
#0B385B
oklch(33.1% 0.078 247.1)
- #4E2D00
#4E2D00
oklch(33.1% 0.073 67.3)
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 #0B385B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Marine Blue #01386A ΔE 0.027
- Midnight Green #073B4C ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.033
- Marine #042E60 ΔE 0.035
- Gunmetal #293241 ΔE 0.052
- Space Cadet #2B2D42 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.057
Use #0B385B 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.