#171B0D
Closest named color: Rich Black (#0D1B2A). oklch(21.3% 0.026 121.7), rgb(23, 27, 13).
Aa
White text reads best on this color (17.51:1).
About this color
#171B0D is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.056 away. White text reads best on it, at 17.51:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.51:1 |
Values
| HEX | #171B0D |
| RGB | rgb(23, 27, 13) |
| HSL | hsl(77, 35%, 8%) |
| OKLCH | oklch(21.3% 0.026 121.7) |
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 #171B0D | 17.51:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #171B0D | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #171B0D text on white | 17.51:1 | AAA | Lc 104.3 | Preferred for body text |
| #171B0D text on black | 1.19:1 | 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
#F5F6F3
oklch(97.2% 0.004 121.6)
-
Step 100
100
#E9EBE4
oklch(93.7% 0.01 119.6)
-
Step 200
200
#D7DBCF
oklch(88.5% 0.017 121.8)
-
Step 300
300
#BDC4AE
oklch(80.9% 0.031 121.5)
-
Step 400
400
#9BA683
oklch(70.7% 0.051 121.9)
-
Step 500
500
#839064
oklch(63.1% 0.064 121.6)
-
Step 600
600
#6D7A4B
oklch(55.7% 0.07 121.3)
-
Step 700
700
#5B673C
oklch(49.2% 0.065 121.6)
-
Step 800
800
#4A5432
oklch(42.8% 0.054 122.1)
-
Step 900
900
#3E452C
oklch(37.7% 0.041 121.1)
-
Step 950
950 (this color)
#171B0D
oklch(21.3% 0.026 121.7)
#171B0D 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) | #1D190C | 0.013 |
| Deuteranopia (no green cones) | #1C190E | 0.012 |
| Tritanopia (no blue cones) | #181A17 | 0.020 |
| Achromatopsia (no color) | #191919 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171B0D
#171B0D
oklch(21.3% 0.026 121.7)
- #1B1623
#1B1623
oklch(21.2% 0.026 301.8)
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 #171B0D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.056
- Jet #212529 ΔE 0.059
- Dark Brown #341C02 ΔE 0.061
- Rich Navy #001219 ΔE 0.063
- Almost Black #070D0D ΔE 0.066
- Dark #1B2431 ΔE 0.067
- Dark Forest Green #002D04 ΔE 0.074
- Very Dark Green #062E03 ΔE 0.077
Use #171B0D 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.