#0F171F
Closest named color: Rich Black (#0D1B2A). oklch(20.1% 0.02 248.9), rgb(15, 23, 31).
Aa
White text reads best on this color (18.06:1).
About this color
#0F171F is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 18.06:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.06:1 |
Values
| HEX | #0F171F |
| RGB | rgb(15, 23, 31) |
| HSL | hsl(210, 35%, 9%) |
| OKLCH | oklch(20.1% 0.02 248.9) |
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 #0F171F | 18.06:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #0F171F | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #0F171F text on white | 18.06:1 | AAA | Lc 104.8 | Preferred for body text |
| #0F171F 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400
#8FA3B8
oklch(70.7% 0.038 249.7)
-
Step 500
500
#738CA6
oklch(63% 0.049 249.6)
-
Step 600
600
#5B7691
oklch(55.5% 0.053 248.8)
-
Step 700
700
#4B637C
oklch(49.1% 0.05 249.9)
-
Step 800
800
#3E5165
oklch(42.7% 0.041 250.1)
-
Step 900
900
#354352
oklch(37.7% 0.032 250.4)
-
Step 950
950 (this color)
#0F171F
oklch(20.1% 0.02 248.9)
#0F171F 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) | #14171F | 0.009 |
| Deuteranopia (no green cones) | #12151F | 0.009 |
| Tritanopia (no blue cones) | #0A191A | 0.017 |
| Achromatopsia (no color) | #161616 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F171F
#0F171F
oklch(20.1% 0.02 248.9)
- #1C150C
#1C150C
oklch(20.2% 0.02 73.3)
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 #0F171F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Rich Navy #001219 ΔE 0.035
- Almost Black #070D0D ΔE 0.051
- Dark #1B2431 ΔE 0.058
- Jet #212529 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.072
- Navy Blue #001146 ΔE 0.083
- Dark Navy #000435 ΔE 0.087
Use #0F171F 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.