#18170F
Closest named color: Rich Black (#0D1B2A). oklch(20.3% 0.015 101.7), rgb(24, 23, 15).
Aa
White text reads best on this color (17.97:1).
About this color
#18170F is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.051 away. White text reads best on it, at 17.97:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.97:1 |
Values
| HEX | #18170F |
| RGB | rgb(24, 23, 15) |
| HSL | hsl(53, 23%, 8%) |
| OKLCH | oklch(20.3% 0.015 101.7) |
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 #18170F | 17.97:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #18170F | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #18170F text on white | 17.97:1 | AAA | Lc 104.7 | Preferred for body text |
| #18170F text on black | 1.16:1 | 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
#F6F5F4
oklch(97.1% 0.002 67.8)
-
Step 100
100
#EAEAE6
oklch(93.6% 0.005 106.5)
-
Step 200
200
#DAD9D2
oklch(88.4% 0.01 100)
-
Step 300
300
#C3C1B4
oklch(80.9% 0.018 99.7)
-
Step 400
400
#A4A28D
oklch(70.8% 0.03 102.7)
-
Step 500
500
#8E8B71
oklch(63.2% 0.038 102)
-
Step 600
600
#787459
oklch(55.5% 0.04 100.5)
-
Step 700
700
#656249
oklch(49.2% 0.038 101.9)
-
Step 800
800
#52503C
oklch(42.7% 0.032 102.9)
-
Step 900
900
#444234
oklch(37.7% 0.023 100.7)
-
Step 950
950 (this color)
#18170F
oklch(20.3% 0.015 101.7)
#18170F 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) | #19160E | 0.004 |
| Deuteranopia (no green cones) | #19170F | 0.002 |
| Tritanopia (no blue cones) | #191615 | 0.014 |
| Achromatopsia (no color) | #171717 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18170F
#18170F
oklch(20.3% 0.015 101.7)
- #15161E
#15161E
oklch(20.3% 0.016 279.3)
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 #18170F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.051
- Rich Navy #001219 ΔE 0.053
- Almost Black #070D0D ΔE 0.054
- Jet #212529 ΔE 0.064
- Dark Brown #341C02 ΔE 0.066
- Dark #1B2431 ΔE 0.069
- Very Dark Brown #1D0200 ΔE 0.072
- Oxford Blue #1B263B ΔE 0.087
Use #18170F 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.