#0B4174
Closest named color: Twilight Blue (#0A437A). oklch(37.2% 0.102 252.1), rgb(11, 65, 116).
Aa
White text reads best on this color (10.38:1).
About this color
#0B4174 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.102 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.011 away. White text reads best on it, at 10.38:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.02:1 |
| White text | 10.38:1 |
Values
| HEX | #0B4174 |
| RGB | rgb(11, 65, 116) |
| HSL | hsl(209, 83%, 25%) |
| OKLCH | oklch(37.2% 0.102 252.1) |
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 #0B4174 | 10.38:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #0B4174 | 2.02:1 | Fails | Lc 10.3 | Not readable |
| #0B4174 text on white | 10.38:1 | AAA | Lc 93.6 | Preferred for body text |
| #0B4174 text on black | 2.02:1 | Fails | Lc -8.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C5DCF5
oklch(88.5% 0.042 250.5)
-
Step 300
300
#9DC4F1
oklch(80.8% 0.076 252.3)
-
Step 400
400
#65A4EB
oklch(70.6% 0.123 252.5)
-
Step 500
500
#348CE4
oklch(63.1% 0.156 251.8)
-
Step 600
600
#0074D0
oklch(55.6% 0.166 251.9)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900 (this color)
#0B4174
oklch(37.2% 0.102 252.1)
-
Step 950
950
#0B2745
oklch(26.9% 0.065 252.8)
#0B4174 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) | #274576 | 0.027 |
| Deuteranopia (no green cones) | #143C73 | 0.015 |
| Tritanopia (no blue cones) | #004D54 | 0.076 |
| Achromatopsia (no color) | #404040 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B4174
#0B4174
oklch(37.2% 0.102 252.1)
- #5A3800
#5A3800
oklch(37.2% 0.08 71.7)
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 #0B4174, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.011
- Marine Blue #01386A ΔE 0.032
- Light Navy #155084 ΔE 0.051
- Cobalt #1E488F ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.059
- Marine #042E60 ΔE 0.065
Use #0B4174 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.