#181824
Closest named color: Rich Black (#0D1B2A). oklch(21.5% 0.023 284.3), rgb(24, 24, 36).
Aa
White text reads best on this color (17.57:1).
About this color
#181824 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.021 away. White text reads best on it, at 17.57:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.57:1 |
Values
| HEX | #181824 |
| RGB | rgb(24, 24, 36) |
| HSL | hsl(240, 20%, 12%) |
| OKLCH | oklch(21.5% 0.023 284.3) |
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 #181824 | 17.57:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #181824 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #181824 text on white | 17.57:1 | AAA | Lc 104.4 | Preferred for body text |
| #181824 text on black | 1.19:1 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9EF
oklch(93.6% 0.008 286.2)
-
Step 200
200
#D7D8E3
oklch(88.5% 0.015 281.9)
-
Step 300
300
#BEBFD2
oklch(81% 0.027 283.4)
-
Step 400
400
#9D9DBC
oklch(70.7% 0.045 285.2)
-
Step 500
500
#8585AB
oklch(63.1% 0.057 284.7)
-
Step 600
600
#6F6F97
oklch(55.7% 0.062 284.2)
-
Step 700
700
#5D5C81
oklch(49.1% 0.059 285.3)
-
Step 800
800
#4C4C68
oklch(42.8% 0.046 284.3)
-
Step 900
900
#3F3F55
oklch(37.7% 0.037 284.5)
-
Step 950
950 (this color)
#181824
oklch(21.5% 0.023 284.3)
#181824 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) | #151925 | 0.006 |
| Deuteranopia (no green cones) | #141924 | 0.008 |
| Tritanopia (no blue cones) | #151A1C | 0.021 |
| Achromatopsia (no color) | #191919 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181824
#181824
oklch(21.5% 0.023 284.3)
- #1B1A0D
#1B1A0D
oklch(21.5% 0.024 104.4)
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 #181824, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.021
- Dark #1B2431 ΔE 0.045
- Jet #212529 ΔE 0.050
- Rich Navy #001219 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.059
- Almost Black #070D0D ΔE 0.067
- Very Dark Purple #2A0134 ΔE 0.081
- Navy Blue #001146 ΔE 0.081
Use #181824 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.