#0B4570
Closest named color: Twilight Blue (#0A437A). oklch(37.9% 0.092 246.9), rgb(11, 69, 112).
Aa
White text reads best on this color (10.00:1).
About this color
#0B4570 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.092 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.019 away. White text reads best on it, at 10.00:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.09:1 |
| White text | 10.00:1 |
Values
| HEX | #0B4570 |
| RGB | rgb(11, 69, 112) |
| HSL | hsl(206, 82%, 24%) |
| OKLCH | oklch(37.9% 0.092 246.9) |
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 #0B4570 | 10.00:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #0B4570 | 2.09:1 | Fails | Lc 11.1 | Not readable |
| #0B4570 text on white | 10.00:1 | AAA | Lc 92.8 | Preferred for body text |
| #0B4570 text on black | 2.09:1 | Fails | Lc -9.7 | 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
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF2
oklch(88.5% 0.038 248.3)
-
Step 300
300
#9DC6EB
oklch(81% 0.068 246)
-
Step 400
400
#64A7E2
oklch(70.8% 0.111 246.7)
-
Step 500
500
#318FDA
oklch(63.1% 0.142 247)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900 (this color)
#0B4570
oklch(37.9% 0.092 246.9)
-
Step 950
950
#0A2841
oklch(26.9% 0.058 247.4)
#0B4570 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) | #304772 | 0.034 |
| Deuteranopia (no green cones) | #213E6F | 0.024 |
| Tritanopia (no blue cones) | #004F55 | 0.064 |
| Achromatopsia (no color) | #424242 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B4570
#0B4570
oklch(37.9% 0.092 246.9)
- #5F3800
#5F3800
oklch(38% 0.084 67.5)
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 #0B4570, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.019
- Marine Blue #01386A ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.043
- Light Navy #155084 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.050
- Charcoal #264653 ΔE 0.054
- Cobalt #1E488F ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.059
Use #0B4570 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.