#0B171D
Closest named color: Rich Black (#0D1B2A). oklch(19.6% 0.021 230.9), rgb(11, 23, 29).
Aa
White text reads best on this color (18.18:1).
About this color
#0B171D is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.028 away. White text reads best on it, at 18.18:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.18:1 |
Values
| HEX | #0B171D |
| RGB | rgb(11, 23, 29) |
| HSL | hsl(200, 45%, 8%) |
| OKLCH | oklch(19.6% 0.021 230.9) |
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 #0B171D | 18.18:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #0B171D | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #0B171D text on white | 18.18:1 | AAA | Lc 104.8 | Preferred for body text |
| #0B171D text on black | 1.15:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B1C4CE
oklch(80.9% 0.025 230.5)
-
Step 400
400
#88A6B5
oklch(70.8% 0.04 229.6)
-
Step 500
500
#6A90A3
oklch(63.2% 0.051 230.2)
-
Step 600
600
#517A8E
oklch(55.7% 0.055 230.1)
-
Step 700
700
#416679
oklch(49% 0.052 231.6)
-
Step 800
800
#365362
oklch(42.6% 0.043 231.6)
-
Step 900
900
#2F4550
oklch(37.7% 0.033 230.4)
-
Step 950
950 (this color)
#0B171D
oklch(19.6% 0.021 230.9)
#0B171D 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) | #14171D | 0.015 |
| Deuteranopia (no green cones) | #11151D | 0.012 |
| Tritanopia (no blue cones) | #041919 | 0.016 |
| Achromatopsia (no color) | #151515 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B171D
#0B171D
oklch(19.6% 0.021 230.9)
- #1D130D
#1D130D
oklch(19.8% 0.02 52.2)
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 #0B171D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.028
- Rich Navy #001219 ΔE 0.030
- Almost Black #070D0D ΔE 0.046
- Dark #1B2431 ΔE 0.063
- Jet #212529 ΔE 0.067
- Oxford Blue #1B263B ΔE 0.078
- Navy Blue #001146 ΔE 0.086
- Dark Navy #000435 ΔE 0.087
Use #0B171D 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.