#09171E
Closest named color: Rich Black (#0D1B2A). oklch(19.6% 0.024 231.5), rgb(9, 23, 30).
Aa
White text reads best on this color (18.21:1).
About this color
#09171E is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 18.21:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.21:1 |
Values
| HEX | #09171E |
| RGB | rgb(9, 23, 30) |
| HSL | hsl(200, 54%, 8%) |
| OKLCH | oklch(19.6% 0.024 231.5) |
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 #09171E | 18.21:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #09171E | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #09171E text on white | 18.21:1 | AAA | Lc 104.9 | Preferred for body text |
| #09171E text on black | 1.15:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AFC4D0
oklch(80.8% 0.029 232.8)
-
Step 400
400
#84A6B8
oklch(70.6% 0.046 231.3)
-
Step 500
500
#6590A7
oklch(63.1% 0.058 232.3)
-
Step 600
600
#4B7A92
oklch(55.5% 0.063 231.7)
-
Step 700
700
#3C677C
oklch(49.1% 0.058 230.8)
-
Step 800
800
#325465
oklch(42.7% 0.049 231.2)
-
Step 900
900
#2C4552
oklch(37.6% 0.038 231.8)
-
Step 950
950 (this color)
#09171E
oklch(19.6% 0.024 231.5)
#09171E 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) | #14171E | 0.017 |
| Deuteranopia (no green cones) | #11141E | 0.016 |
| Tritanopia (no blue cones) | #011919 | 0.019 |
| Achromatopsia (no color) | #151515 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09171E
#09171E
oklch(19.6% 0.024 231.5)
- #1E120B
#1E120B
oklch(19.6% 0.024 51.1)
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 #09171E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Rich Navy #001219 ΔE 0.028
- Almost Black #070D0D ΔE 0.046
- Dark #1B2431 ΔE 0.064
- Jet #212529 ΔE 0.068
- Oxford Blue #1B263B ΔE 0.078
- Navy Blue #001146 ΔE 0.084
- Dark Navy #000435 ΔE 0.084
Use #09171E 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.