#0B1B48
Closest named color: Navy Blue (#001146). oklch(24.1% 0.087 265.4), rgb(11, 27, 72).
Aa
White text reads best on this color (16.60:1).
About this color
#0B1B48 is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.087 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.035 away. White text reads best on it, at 16.60:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.26:1 |
| White text | 16.60:1 |
Values
| HEX | #0B1B48 |
| RGB | rgb(11, 27, 72) |
| HSL | hsl(224, 73%, 16%) |
| OKLCH | oklch(24.1% 0.087 265.4) |
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 #0B1B48 | 16.60:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #0B1B48 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #0B1B48 text on white | 16.60:1 | AAA | Lc 103.3 | Preferred for body text |
| #0B1B48 text on black | 1.26:1 | 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 950.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#729CFF
oklch(70.6% 0.153 265.4)
-
Step 500
500
#4F7FFF
oklch(63.1% 0.197 265.6)
-
Step 600
600
#3161F6
oklch(55.5% 0.229 265.5)
-
Step 700
700
#254FD7
oklch(49.1% 0.213 265.5)
-
Step 800
800
#1F42AD
oklch(42.7% 0.176 265.4)
-
Step 900
900
#1D3A89
oklch(37.8% 0.137 265.1)
-
Step 950
950 (this color)
#0B1B48
oklch(24.1% 0.087 265.4)
#0B1B48 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) | #00214A | 0.019 |
| Deuteranopia (no green cones) | #001C47 | 0.012 |
| Tritanopia (no blue cones) | #00262E | 0.068 |
| Achromatopsia (no color) | #1E1E1E | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1B48
#0B1B48
oklch(24.1% 0.087 265.4)
- #2A1D00
#2A1D00
oklch(24% 0.049 84.9)
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 #0B1B48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.035
- Dark Indigo #1F0954 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.053
- Rich Black #0D1B2A ΔE 0.058
- Night Blue #040348 ΔE 0.060
- Dark #1B2431 ΔE 0.062
- Darkblue #030764 ΔE 0.064
- Marine #042E60 ΔE 0.069
Use #0B1B48 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.