#0B4A75
Closest named color: Twilight Blue (#0A437A). oklch(39.5% 0.094 245.2), rgb(11, 74, 117).
Aa
White text reads best on this color (9.33:1).
About this color
#0B4A75 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.094 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.25:1 |
| White text | 9.33:1 |
Values
| HEX | #0B4A75 |
| RGB | rgb(11, 74, 117) |
| HSL | hsl(204, 83%, 25%) |
| OKLCH | oklch(39.5% 0.094 245.2) |
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 #0B4A75 | 9.33:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #0B4A75 | 2.25:1 | Fails | Lc 12.8 | Not readable |
| #0B4A75 text on white | 9.33:1 | AAA | Lc 91.1 | Preferred for body text |
| #0B4A75 text on black | 2.25:1 | Fails | Lc -11.2 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9BC6EC
oklch(80.9% 0.071 245.5)
-
Step 400
400
#60A7E2
oklch(70.6% 0.113 245.4)
-
Step 500
500
#2890DA
oklch(63.1% 0.144 245.2)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900 (this color)
#0B4A75
oklch(39.5% 0.094 245.2)
-
Step 950
950
#072941
oklch(27.1% 0.059 244.2)
#0B4A75 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) | #354C77 | 0.038 |
| Deuteranopia (no green cones) | #264374 | 0.026 |
| Tritanopia (no blue cones) | #00545A | 0.064 |
| Achromatopsia (no color) | #474747 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B4A75
#0B4A75
oklch(39.5% 0.094 245.2)
- #663B00
#663B00
oklch(39.6% 0.088 65.7)
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 #0B4A75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Light Navy #155084 ΔE 0.030
- Deep Sea Blue #015482 ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.046
- Cobalt #1E488F ΔE 0.048
- Dusk Blue #26538D ΔE 0.052
- Charcoal #264653 ΔE 0.058
- Marine Blue #01386A ΔE 0.058
Use #0B4A75 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.