#09181F
Closest named color: Rich Black (#0D1B2A). oklch(19.9% 0.025 229.9), rgb(9, 24, 31).
Aa
White text reads best on this color (18.07:1).
About this color
#09181F is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 18.07:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.07:1 |
Values
| HEX | #09181F |
| RGB | rgb(9, 24, 31) |
| HSL | hsl(199, 55%, 8%) |
| OKLCH | oklch(19.9% 0.025 229.9) |
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 #09181F | 18.07:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #09181F | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #09181F text on white | 18.07:1 | AAA | Lc 104.7 | Preferred for body text |
| #09181F text on black | 1.16:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AEC5D0
oklch(81% 0.029 228.2)
-
Step 400
400
#83A7B9
oklch(70.8% 0.047 229.9)
-
Step 500
500
#6391A7
oklch(63.2% 0.06 229.4)
-
Step 600
600
#487B92
oklch(55.6% 0.065 228.8)
-
Step 700
700
#39677D
oklch(49% 0.062 230.5)
-
Step 800
800
#305465
oklch(42.6% 0.05 229.9)
-
Step 900
900
#2B4653
oklch(37.8% 0.04 229.9)
-
Step 950
950 (this color)
#09181F
oklch(19.9% 0.025 229.9)
#09181F 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) | #14181F | 0.017 |
| Deuteranopia (no green cones) | #11151F | 0.016 |
| Tritanopia (no blue cones) | #011A1A | 0.019 |
| Achromatopsia (no color) | #161616 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09181F
#09181F
oklch(19.9% 0.025 229.9)
- #1F130C
#1F130C
oklch(20.1% 0.024 51.2)
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 #09181F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Rich Navy #001219 ΔE 0.031
- Almost Black #070D0D ΔE 0.050
- Dark #1B2431 ΔE 0.060
- Jet #212529 ΔE 0.065
- Oxford Blue #1B263B ΔE 0.074
- Navy Blue #001146 ΔE 0.083
- Dark Navy #000435 ΔE 0.086
Use #09181F 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.