#17180C
Closest named color: Rich Black (#0D1B2A). oklch(20.4% 0.022 112.2), rgb(23, 24, 12).
Aa
White text reads best on this color (17.91:1).
About this color
#17180C is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.022. 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 17.91:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.91:1 |
Values
| HEX | #17180C |
| RGB | rgb(23, 24, 12) |
| HSL | hsl(65, 33%, 7%) |
| OKLCH | oklch(20.4% 0.022 112.2) |
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 #17180C | 17.91:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #17180C | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #17180C text on white | 17.91:1 | AAA | Lc 104.7 | Preferred for body text |
| #17180C text on black | 1.17:1 | 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
#EAEAE5
oklch(93.6% 0.007 106.5)
-
Step 200
200
#D9DACF
oklch(88.5% 0.015 110.9)
-
Step 300
300
#C0C3AF
oklch(80.9% 0.028 113.9)
-
Step 400
400
#A1A486
oklch(70.8% 0.042 112.1)
-
Step 500
500
#8A8D67
oklch(63.1% 0.054 111.6)
-
Step 600
600
#74774F
oklch(55.6% 0.058 111.8)
-
Step 700
700
#61643F
oklch(49.1% 0.055 112.2)
-
Step 800
800
#4F5235
oklch(42.8% 0.045 113.1)
-
Step 900
900
#42442E
oklch(37.8% 0.035 112.3)
-
Step 950
950 (this color)
#17180C
oklch(20.4% 0.022 112.2)
#17180C 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) | #1A170B | 0.006 |
| Deuteranopia (no green cones) | #1A170D | 0.008 |
| Tritanopia (no blue cones) | #181715 | 0.019 |
| Achromatopsia (no color) | #171717 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17180C
#17180C
oklch(20.4% 0.022 112.2)
- #171520
#171520
oklch(20.3% 0.022 292.7)
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 #17180C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.056
- Rich Navy #001219 ΔE 0.056
- Almost Black #070D0D ΔE 0.057
- Dark Brown #341C02 ΔE 0.065
- Jet #212529 ΔE 0.065
- Dark #1B2431 ΔE 0.072
- Very Dark Brown #1D0200 ΔE 0.075
- Dark Forest Green #002D04 ΔE 0.085
Use #17180C 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.