#171D15
Closest named color: Rich Black (#0D1B2A). oklch(22.2% 0.018 137.9), rgb(23, 29, 21).
Aa
White text reads best on this color (17.17:1).
About this color
#171D15 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.046 away. White text reads best on it, at 17.17:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.17:1 |
Values
| HEX | #171D15 |
| RGB | rgb(23, 29, 21) |
| HSL | hsl(105, 16%, 10%) |
| OKLCH | oklch(22.2% 0.018 137.9) |
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 #171D15 | 17.17:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #171D15 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #171D15 text on white | 17.17:1 | AAA | Lc 104.1 | Preferred for body text |
| #171D15 text on black | 1.22:1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E8EBE7
oklch(93.7% 0.006 137.8)
-
Step 200
200
#D5DBD4
oklch(88.5% 0.011 141.3)
-
Step 300
300
#BAC4B7
oklch(80.9% 0.021 138.4)
-
Step 400
400
#97A692
oklch(70.8% 0.033 137.8)
-
Step 500
500
#7D9077
oklch(63.1% 0.043 138.2)
-
Step 600
600
#667A60
oklch(55.6% 0.046 138.5)
-
Step 700
700
#55674F
oklch(49.2% 0.043 137.9)
-
Step 800
800
#465441
oklch(42.8% 0.035 137.5)
-
Step 900
900
#3A4537
oklch(37.6% 0.027 139)
-
Step 950
950 (this color)
#171D15
oklch(22.2% 0.018 137.9)
#171D15 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) | #1E1C15 | 0.013 |
| Deuteranopia (no green cones) | #1D1B15 | 0.013 |
| Tritanopia (no blue cones) | #171C1B | 0.013 |
| Achromatopsia (no color) | #1B1B1B | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171D15
#171D15
oklch(22.2% 0.018 137.9)
- #1E1820
#1E1820
oklch(22% 0.018 317.6)
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 #171D15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.046
- Jet #212529 ΔE 0.046
- Dark #1B2431 ΔE 0.054
- Dark Brown #341C02 ΔE 0.061
- Rich Navy #001219 ΔE 0.063
- Almost Black #070D0D ΔE 0.071
- Oxford Blue #1B263B ΔE 0.072
- Dark Forest Green #002D04 ΔE 0.075
Use #171D15 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.