#181E2C
Closest named color: Rich Black (#0D1B2A). oklch(23.6% 0.029 266.3), rgb(24, 30, 44).
Aa
White text reads best on this color (16.65:1).
About this color
#181E2C is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.029. 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 16.65:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.65:1 |
Values
| HEX | #181E2C |
| RGB | rgb(24, 30, 44) |
| HSL | hsl(222, 29%, 13%) |
| OKLCH | oklch(23.6% 0.029 266.3) |
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 #181E2C | 16.65:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #181E2C | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #181E2C text on white | 16.65:1 | AAA | Lc 103.6 | Preferred for body text |
| #181E2C text on black | 1.26:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B6C1D7
oklch(80.9% 0.033 264.4)
-
Step 400
400
#91A0C3
oklch(70.6% 0.054 266.8)
-
Step 500
500
#7689B4
oklch(63.1% 0.069 266)
-
Step 600
600
#5F72A0
oklch(55.6% 0.075 266.7)
-
Step 700
700
#4E6089
oklch(49.2% 0.07 265.7)
-
Step 800
800
#404E6F
oklch(42.6% 0.058 266.3)
-
Step 900
900
#36415A
oklch(37.7% 0.045 265.9)
-
Step 950
950 (this color)
#181E2C
oklch(23.6% 0.029 266.3)
#181E2C 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) | #191F2D | 0.004 |
| Deuteranopia (no green cones) | #171D2C | 0.004 |
| Tritanopia (no blue cones) | #122123 | 0.026 |
| Achromatopsia (no color) | #1E1E1E | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181E2C
#181E2C
oklch(23.6% 0.029 266.3)
- #241D0E
#241D0E
oklch(23.5% 0.028 85.3)
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 #181E2C, 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 0.022
- Jet #212529 ΔE 0.033
- Oxford Blue #1B263B ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.070
- Rich Navy #001219 ΔE 0.071
- Navy Blue #001146 ΔE 0.078
- Gunmetal #293241 ΔE 0.079
Use #181E2C 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.