#0B4366
Closest named color: Dark Grey Blue (#29465B). oklch(36.8% 0.081 242.5), rgb(11, 67, 102).
Aa
White text reads best on this color (10.45:1).
About this color
#0B4366 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.081 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.034 away. White text reads best on it, at 10.45:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #0B4366 |
| RGB | rgb(11, 67, 102) |
| HSL | hsl(203, 81%, 22%) |
| OKLCH | oklch(36.8% 0.081 242.5) |
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 #0B4366 | 10.45:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #0B4366 | 2.00:1 | Fails | Lc 10.0 | Not readable |
| #0B4366 text on white | 10.45:1 | AAA | Lc 93.9 | Preferred for body text |
| #0B4366 text on black | 2.00:1 | Fails | Lc -8.7 | 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
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C7DCEE
oklch(88.4% 0.034 244)
-
Step 300
300
#9FC6E5
oklch(80.9% 0.061 242.5)
-
Step 400
400
#68A8D8
oklch(70.7% 0.097 242.3)
-
Step 500
500
#3891CE
oklch(63.1% 0.124 242.6)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900 (this color)
#0B4366
oklch(36.8% 0.081 242.5)
-
Step 950
950
#0C293D
oklch(27% 0.051 242.2)
#0B4366 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) | #324468 | 0.037 |
| Deuteranopia (no green cones) | #263C65 | 0.028 |
| Tritanopia (no blue cones) | #004C50 | 0.055 |
| Achromatopsia (no color) | #3F3F3F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B4366
#0B4366
oklch(36.8% 0.081 242.5)
- #5D3404
#5D3404
oklch(36.9% 0.081 62.6)
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 #0B4366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.034
- Twilight Blue #0A437A ΔE 0.035
- Marine Blue #01386A ΔE 0.038
- Charcoal #264653 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.046
- Midnight Green #073B4C ΔE 0.049
- Dark Teal #014D4E ΔE 0.061
Use #0B4366 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.