#181F2C
Closest named color: Dark (#1B2431). oklch(23.9% 0.027 262.5), rgb(24, 31, 44).
Aa
White text reads best on this color (16.51:1).
About this color
#181F2C is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.027. 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 16.51:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.27:1 |
| White text | 16.51:1 |
Values
| HEX | #181F2C |
| RGB | rgb(24, 31, 44) |
| HSL | hsl(219, 29%, 13%) |
| OKLCH | oklch(23.9% 0.027 262.5) |
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 #181F2C | 16.51:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #181F2C | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #181F2C text on white | 16.51:1 | AAA | Lc 103.5 | Preferred for body text |
| #181F2C 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D3D9E5
oklch(88.4% 0.018 264.5)
-
Step 300
300
#B6C1D6
oklch(80.9% 0.032 263.5)
-
Step 400
400
#90A1C1
oklch(70.7% 0.051 263)
-
Step 500
500
#748AB2
oklch(63.1% 0.066 262.2)
-
Step 600
600
#5D739E
oklch(55.6% 0.072 263.3)
-
Step 700
700
#4C6187
oklch(49.2% 0.066 261.9)
-
Step 800
800
#3F4F6D
oklch(42.7% 0.054 262.6)
-
Step 900
900
#354259
oklch(37.8% 0.043 261.6)
-
Step 950
950 (this color)
#181F2C
oklch(23.9% 0.027 262.5)
#181F2C 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) | #1B202D | 0.007 |
| Deuteranopia (no green cones) | #181E2C | 0.004 |
| Tritanopia (no blue cones) | #122223 | 0.025 |
| Achromatopsia (no color) | #1F1F1F | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181F2C
#181F2C
oklch(23.9% 0.027 262.5)
- #251E10
#251E10
oklch(23.9% 0.027 84)
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 #181F2C, 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 0.023
- Jet #212529 ΔE 0.030
- Oxford Blue #1B263B ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.068
- Rich Navy #001219 ΔE 0.073
- Gunmetal #293241 ΔE 0.077
- Navy Blue #001146 ΔE 0.080
Use #181F2C 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.