#0B1734
Closest named color: Rich Black (#0D1B2A). oklch(21.3% 0.06 264.9), rgb(11, 23, 52).
Aa
White text reads best on this color (17.70:1).
About this color
#0B1734 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.060 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 17.70:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.70:1 |
Values
| HEX | #0B1734 |
| RGB | rgb(11, 23, 52) |
| HSL | hsl(222, 65%, 12%) |
| OKLCH | oklch(21.3% 0.06 264.9) |
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 #0B1734 | 17.70:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #0B1734 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #0B1734 text on white | 17.70:1 | AAA | Lc 104.4 | Preferred for body text |
| #0B1734 text on black | 1.18:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCD9F4
oklch(88.4% 0.04 265.1)
-
Step 300
300
#AAC1EF
oklch(81% 0.07 264.1)
-
Step 400
400
#7E9FE7
oklch(70.7% 0.112 264.9)
-
Step 500
500
#5E85E0
oklch(63.1% 0.144 265.1)
-
Step 600
600
#456DCE
oklch(55.6% 0.157 264.9)
-
Step 700
700
#375AB2
oklch(49% 0.146 265.1)
-
Step 800
800
#2D4A90
oklch(42.6% 0.121 264.8)
-
Step 900
900
#283F73
oklch(37.7% 0.094 264.4)
-
Step 950
950 (this color)
#0B1734
oklch(21.3% 0.06 264.9)
#0B1734 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) | #081A35 | 0.010 |
| Deuteranopia (no green cones) | #031733 | 0.011 |
| Tritanopia (no blue cones) | #001E22 | 0.051 |
| Achromatopsia (no color) | #181818 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1734
#0B1734
oklch(21.3% 0.06 264.9)
- #221700
#221700
oklch(21.3% 0.044 85.3)
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 #0B1734, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Navy Blue #001146 ΔE 0.043
- Dark #1B2431 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.059
- Rich Navy #001219 ΔE 0.061
- Dark Navy #000435 ΔE 0.064
- Night Blue #040348 ΔE 0.064
- Jet #212529 ΔE 0.071
Use #0B1734 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.