#1F181F
Closest named color: Rich Black (#0D1B2A). oklch(22.1% 0.017 326.1), rgb(31, 24, 31).
Aa
White text reads best on this color (17.37:1).
About this color
#1F181F is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.035 away. White text reads best on it, at 17.37:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.37:1 |
Values
| HEX | #1F181F |
| RGB | rgb(31, 24, 31) |
| HSL | hsl(300, 13%, 11%) |
| OKLCH | oklch(22.1% 0.017 326.1) |
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 #1F181F | 17.37:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #1F181F | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #1F181F text on white | 17.37:1 | AAA | Lc 104.2 | Preferred for body text |
| #1F181F text on black | 1.20:1 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#ECE8EC
oklch(93.5% 0.007 325.6)
-
Step 200
200
#DDD7DD
oklch(88.6% 0.01 325.7)
-
Step 300
300
#C8BCC8
oklch(80.9% 0.021 325.8)
-
Step 400
400
#AC9AAC
oklch(70.8% 0.033 325.9)
-
Step 500
500
#978197
oklch(63.1% 0.041 326.1)
-
Step 600
600
#826A82
oklch(55.6% 0.047 326.2)
-
Step 700
700
#6E596E
oklch(49.2% 0.042 326.2)
-
Step 800
800
#594959
oklch(42.8% 0.033 326.1)
-
Step 900
900
#493D49
oklch(37.7% 0.026 326.1)
-
Step 950
950 (this color)
#1F181F
oklch(22.1% 0.017 326.1)
#1F181F 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) | #181A1F | 0.015 |
| Deuteranopia (no green cones) | #191A1F | 0.013 |
| Tritanopia (no blue cones) | #1F191A | 0.012 |
| Achromatopsia (no color) | #1A1A1A | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F181F
#1F181F
oklch(22.1% 0.017 326.1)
- #161D16
#161D16
oklch(22.1% 0.017 145)
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 #1F181F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.035
- Jet #212529 ΔE 0.045
- Dark #1B2431 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.062
- Rich Navy #001219 ΔE 0.065
- Dark Brown #341C02 ΔE 0.068
- Almost Black #070D0D ΔE 0.072
- Dark Maroon #3C0008 ΔE 0.082
Use #1F181F 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.