#151F1F
Closest named color: Rich Black (#0D1B2A). oklch(23% 0.014 196.2), rgb(21, 31, 31).
Aa
White text reads best on this color (16.83:1).
About this color
#151F1F is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.014. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.032 away. White text reads best on it, at 16.83:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.014) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.83:1 |
Values
| HEX | #151F1F |
| RGB | rgb(21, 31, 31) |
| HSL | hsl(180, 19%, 10%) |
| OKLCH | oklch(23% 0.014 196.2) |
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 #151F1F | 16.83:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #151F1F | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #151F1F text on white | 16.83:1 | AAA | Lc 103.7 | Preferred for body text |
| #151F1F 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDB
oklch(88.5% 0.01 197)
-
Step 300
300
#B5C4C4
oklch(80.9% 0.016 196.8)
-
Step 400
400
#8EA6A6
oklch(70.7% 0.027 196.6)
-
Step 500
500
#719090
oklch(63% 0.035 196.3)
-
Step 600
600
#597A7B
oklch(55.5% 0.038 198.5)
-
Step 700
700
#496767
oklch(49% 0.035 196.1)
-
Step 800
800
#3C5454
oklch(42.6% 0.029 196.1)
-
Step 900
900
#344545
oklch(37.6% 0.022 196.3)
-
Step 950
950 (this color)
#151F1F
oklch(23% 0.014 196.2)
#151F1F 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) | #1E1E1F | 0.016 |
| Deuteranopia (no green cones) | #1C1D1F | 0.013 |
| Tritanopia (no blue cones) | #12201F | 0.005 |
| Achromatopsia (no color) | #1D1D1D | 0.014 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #151F1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Jet #212529 ΔE 0.034
- Dark #1B2431 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.055
- Rich Navy #001219 ΔE 0.064
- Dark Brown #341C02 ΔE 0.069
- Almost Black #070D0D ΔE 0.077
- Dark Forest Green #002D04 ΔE 0.080
Use #151F1F 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.