#0B1748
Closest named color: Navy Blue (#001146). oklch(23.2% 0.093 267.7), rgb(11, 23, 72).
Aa
White text reads best on this color (17.06:1).
About this color
#0B1748 is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.093 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.025 away. White text reads best on it, at 17.06:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.23:1 |
| White text | 17.06:1 |
Values
| HEX | #0B1748 |
| RGB | rgb(11, 23, 72) |
| HSL | hsl(228, 73%, 16%) |
| OKLCH | oklch(23.2% 0.093 267.7) |
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 #0B1748 | 17.06:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #0B1748 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #0B1748 text on white | 17.06:1 | AAA | Lc 103.7 | Preferred for body text |
| #0B1748 text on black | 1.23:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#567DFF
oklch(63% 0.198 267.8)
-
Step 600
600
#395BFF
oklch(55.6% 0.245 267.9)
-
Step 700
700
#2C49DE
oklch(49% 0.227 267.7)
-
Step 800
800
#253EB4
oklch(42.8% 0.188 267.8)
-
Step 900
900
#21378E
oklch(37.8% 0.146 267.8)
-
Step 950
950 (this color)
#0B1748
oklch(23.2% 0.093 267.7)
#0B1748 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) | #001F4A | 0.024 |
| Deuteranopia (no green cones) | #001947 | 0.013 |
| Tritanopia (no blue cones) | #00242C | 0.075 |
| Achromatopsia (no color) | #1C1C1C | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1748
#0B1748
oklch(23.2% 0.093 267.7)
- #271C00
#271C00
oklch(23.3% 0.048 88.1)
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 #0B1748, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.025
- Dark Indigo #1F0954 ΔE 0.045
- Night Blue #040348 ΔE 0.049
- Darkblue #030764 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.061
- Oxford Blue #1B263B ΔE 0.063
- Dark #1B2431 ΔE 0.071
- Dark Navy #000435 ΔE 0.072
Use #0B1748 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.