#171B0C
Closest named color: Rich Black (#0D1B2A). oklch(21.3% 0.028 121), rgb(23, 27, 12).
Aa
White text reads best on this color (17.52:1).
About this color
#171B0C is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.058 away. White text reads best on it, at 17.52:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.52:1 |
Values
| HEX | #171B0C |
| RGB | rgb(23, 27, 12) |
| HSL | hsl(76, 38%, 8%) |
| OKLCH | oklch(21.3% 0.028 121) |
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 #171B0C | 17.52:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #171B0C | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #171B0C text on white | 17.52:1 | AAA | Lc 104.3 | Preferred for body text |
| #171B0C 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
#D7DBCE
oklch(88.5% 0.018 120.7)
-
Step 300
300
#BDC4AD
oklch(80.9% 0.032 120.9)
-
Step 400
400
#9BA681
oklch(70.6% 0.053 121.2)
-
Step 500
500
#839061
oklch(63.1% 0.068 121)
-
Step 600
600
#6D7A48
oklch(55.6% 0.073 120.7)
-
Step 700
700
#5B6739
oklch(49.2% 0.069 120.9)
-
Step 800
800
#4A5430
oklch(42.7% 0.057 121.5)
-
Step 900
900
#3E452A
oklch(37.6% 0.044 120.4)
-
Step 950
950 (this color)
#171B0C
oklch(21.3% 0.028 121)
#171B0C 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) | #1D190B | 0.013 |
| Deuteranopia (no green cones) | #1C190D | 0.012 |
| Tritanopia (no blue cones) | #181A17 | 0.022 |
| Achromatopsia (no color) | #191919 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171B0C
#171B0C
oklch(21.3% 0.028 121)
- #1B1624
#1B1624
oklch(21.3% 0.028 300.4)
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 #171B0C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.058
- Jet #212529 ΔE 0.060
- Dark Brown #341C02 ΔE 0.061
- Rich Navy #001219 ΔE 0.064
- Almost Black #070D0D ΔE 0.067
- Dark #1B2431 ΔE 0.069
- Dark Forest Green #002D04 ΔE 0.074
- Very Dark Green #062E03 ΔE 0.076
Use #171B0C 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.