#18181B
Closest named color: Rich Black (#0D1B2A). oklch(21% 0.006 285.9), rgb(24, 24, 27).
Aa
White text reads best on this color (17.71:1).
About this color
#18181B is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.006. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.032 away. White text reads best on it, at 17.71:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.006) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.71:1 |
Values
| HEX | #18181B |
| RGB | rgb(24, 24, 27) |
| HSL | hsl(240, 6%, 10%) |
| OKLCH | oklch(21% 0.006 285.9) |
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 #18181B | 17.71:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #18181B | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #18181B text on white | 17.71:1 | AAA | Lc 104.5 | Preferred for body text |
| #18181B text on black | 1.18:1 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#EAEAEB
oklch(93.7% 0.001 286.4)
-
Step 200
200
#D9D9DB
oklch(88.6% 0.003 286.3)
-
Step 300
300
#C0C0C5
oklch(80.9% 0.007 286.2)
-
Step 400
400
#A0A0A7
oklch(70.8% 0.01 286.1)
-
Step 500
500
#888892
oklch(63% 0.015 286)
-
Step 600
600
#72727C
oklch(55.5% 0.015 285.9)
-
Step 700
700
#606069
oklch(49.2% 0.014 285.9)
-
Step 800
800
#4E4E55
oklch(42.6% 0.011 285.9)
-
Step 900
900
#414146
oklch(37.7% 0.008 286)
-
Step 950
950 (this color)
#18181B
oklch(21% 0.006 285.9)
#18181B 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) | #17181B | 0.002 |
| Deuteranopia (no green cones) | #17181B | 0.002 |
| Tritanopia (no blue cones) | #171819 | 0.005 |
| Achromatopsia (no color) | #181818 | 0.006 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #18181B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Rich Navy #001219 ΔE 0.051
- Jet #212529 ΔE 0.052
- Dark #1B2431 ΔE 0.053
- Almost Black #070D0D ΔE 0.059
- Oxford Blue #1B263B ΔE 0.070
- Dark Brown #341C02 ΔE 0.073
- Very Dark Brown #1D0200 ΔE 0.082
Use #18181B 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.