#181D25
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.017 259.7), rgb(24, 29, 37).
Aa
White text reads best on this color (16.91:1).
About this color
#181D25 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 16.91:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.91:1 |
Values
| HEX | #181D25 |
| RGB | rgb(24, 29, 37) |
| HSL | hsl(217, 21%, 12%) |
| OKLCH | oklch(22.9% 0.017 259.7) |
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 #181D25 | 16.91:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #181D25 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #181D25 text on white | 16.91:1 | AAA | Lc 103.8 | Preferred for body text |
| #181D25 text on black | 1.24:1 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D5D9E1
oklch(88.5% 0.012 264.5)
-
Step 300
300
#B9C1CE
oklch(80.9% 0.02 260.2)
-
Step 400
400
#95A1B6
oklch(70.6% 0.034 261.7)
-
Step 500
500
#7B8AA3
oklch(63% 0.042 260.6)
-
Step 600
600
#64748E
oklch(55.6% 0.045 260.1)
-
Step 700
700
#536179
oklch(49% 0.042 261.1)
-
Step 800
800
#445063
oklch(42.8% 0.035 259.5)
-
Step 900
900
#394250
oklch(37.7% 0.027 259.2)
-
Step 950
950 (this color)
#181D25
oklch(22.9% 0.017 259.7)
#181D25 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) | #1A1D25 | 0.003 |
| Deuteranopia (no green cones) | #191C25 | 0.004 |
| Tritanopia (no blue cones) | #141F20 | 0.016 |
| Achromatopsia (no color) | #1D1D1D | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181D25
#181D25
oklch(22.9% 0.017 259.7)
- #211C14
#211C14
oklch(23% 0.017 79.4)
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 #181D25, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Dark #1B2431 ΔE 0.030
- Jet #212529 ΔE 0.034
- Oxford Blue #1B263B ΔE 0.047
- Rich Navy #001219 ΔE 0.064
- Dark Brown #341C02 ΔE 0.075
- Almost Black #070D0D ΔE 0.079
- Space Cadet #2B2D42 ΔE 0.079
Use #181D25 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.