#091B18
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.025 181.7), rgb(9, 27, 24).
Aa
White text reads best on this color (17.77:1).
About this color
#091B18 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 17.77:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.77:1 |
Values
| HEX | #091B18 |
| RGB | rgb(9, 27, 24) |
| HSL | hsl(170, 50%, 7%) |
| OKLCH | oklch(20.6% 0.025 181.7) |
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 #091B18 | 17.77:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #091B18 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #091B18 text on white | 17.77:1 | AAA | Lc 104.5 | Preferred for body text |
| #091B18 text on black | 1.18:1 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CEDDDA
oklch(88.5% 0.017 182.7)
-
Step 300
300
#ADC7C2
oklch(80.9% 0.029 182.7)
-
Step 400
400
#81ABA2
oklch(70.8% 0.047 180.2)
-
Step 500
500
#5F968C
oklch(63.2% 0.06 181.5)
-
Step 600
600
#448076
oklch(55.6% 0.065 181.8)
-
Step 700
700
#356C63
oklch(49.1% 0.06 181.8)
-
Step 800
800
#2D5851
oklch(42.7% 0.05 182.1)
-
Step 900
900
#294943
oklch(37.9% 0.039 180.8)
-
Step 950
950 (this color)
#091B18
oklch(20.6% 0.025 181.7)
#091B18 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) | #1A1918 | 0.027 |
| Deuteranopia (no green cones) | #171718 | 0.025 |
| Tritanopia (no blue cones) | #031C1A | 0.008 |
| Achromatopsia (no color) | #181818 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #091B18
#091B18
oklch(20.6% 0.025 181.7)
- #211216
#211216
oklch(20.4% 0.026 2.2)
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 #091B18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Rich Navy #001219 ΔE 0.042
- Almost Black #070D0D ΔE 0.055
- Jet #212529 ΔE 0.061
- Dark #1B2431 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.078
- Dark Forest Green #002D04 ΔE 0.084
- Dark Brown #341C02 ΔE 0.084
Use #091B18 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.