#181F2D
Closest named color: Dark (#1B2431). oklch(23.9% 0.029 263.8), rgb(24, 31, 45).
Aa
White text reads best on this color (16.50:1).
About this color
#181F2D 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 Dark (#1B2431), ΔE 0.019 away. White text reads best on it, at 16.50:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.27:1 |
| White text | 16.50:1 |
Values
| HEX | #181F2D |
| RGB | rgb(24, 31, 45) |
| HSL | hsl(220, 30%, 14%) |
| OKLCH | oklch(23.9% 0.029 263.8) |
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 #181F2D | 16.50:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #181F2D | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #181F2D text on white | 16.50:1 | AAA | Lc 103.4 | Preferred for body text |
| #181F2D text on black | 1.27:1 | 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
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B5C1D7
oklch(80.9% 0.034 262.7)
-
Step 400
400
#8FA1C4
oklch(70.7% 0.055 263.6)
-
Step 500
500
#7489B5
oklch(63.1% 0.071 264.7)
-
Step 600
600
#5C73A0
oklch(55.6% 0.076 263.3)
-
Step 700
700
#4C6089
oklch(49% 0.071 264)
-
Step 800
800
#3E4F6F
oklch(42.7% 0.058 262.6)
-
Step 900
900
#35415A
oklch(37.6% 0.046 264.5)
-
Step 950
950 (this color)
#181F2D
oklch(23.9% 0.029 263.8)
#181F2D 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) | #1A202E | 0.005 |
| Deuteranopia (no green cones) | #181E2D | 0.004 |
| Tritanopia (no blue cones) | #112224 | 0.026 |
| Achromatopsia (no color) | #1F1F1F | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181F2D
#181F2D
oklch(23.9% 0.029 263.8)
- #261E0F
#261E0F
oklch(24% 0.029 82.3)
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 #181F2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.019
- Rich Black #0D1B2A ΔE 0.024
- Jet #212529 ΔE 0.030
- Oxford Blue #1B263B ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.067
- Rich Navy #001219 ΔE 0.073
- Gunmetal #293241 ΔE 0.076
- Navy Blue #001146 ΔE 0.079
Use #181F2D 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.