#171F18
Closest named color: Jet (#212529). oklch(22.9% 0.018 148.4), rgb(23, 31, 24).
Aa
White text reads best on this color (16.85:1).
About this color
#171F18 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.040 away. White text reads best on it, at 16.85:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.24:1 |
| White text | 16.85:1 |
Values
| HEX | #171F18 |
| RGB | rgb(23, 31, 24) |
| HSL | hsl(128, 15%, 11%) |
| OKLCH | oklch(22.9% 0.018 148.4) |
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 #171F18 | 16.85:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #171F18 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #171F18 text on white | 16.85:1 | AAA | Lc 103.8 | Preferred for body text |
| #171F18 text on black | 1.24:1 | 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
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D4DBD5
oklch(88.4% 0.011 149.8)
-
Step 300
300
#B8C5B9
oklch(81% 0.022 147.6)
-
Step 400
400
#93A795
oklch(70.8% 0.034 148)
-
Step 500
500
#78917B
oklch(63.1% 0.043 148.4)
-
Step 600
600
#617B64
oklch(55.6% 0.046 148.1)
-
Step 700
700
#506853
oklch(49.1% 0.044 148.3)
-
Step 800
800
#425544
oklch(42.8% 0.036 147.7)
-
Step 900
900
#384639
oklch(37.8% 0.028 146.9)
-
Step 950
950 (this color)
#171F18
oklch(22.9% 0.018 148.4)
#171F18 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) | #1F1E18 | 0.014 |
| Deuteranopia (no green cones) | #1E1D18 | 0.014 |
| Tritanopia (no blue cones) | #161F1D | 0.009 |
| Achromatopsia (no color) | #1D1D1D | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171F18
#171F18
oklch(22.9% 0.018 148.4)
- #211A21
#211A21
oklch(22.9% 0.017 326.1)
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 #171F18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.045
- Dark #1B2431 ΔE 0.048
- Dark Brown #341C02 ΔE 0.060
- Oxford Blue #1B263B ΔE 0.066
- Rich Navy #001219 ΔE 0.068
- Dark Forest Green #002D04 ΔE 0.072
- Very Dark Green #062E03 ΔE 0.074
Use #171F18 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.