#0D171B
Closest named color: Rich Black (#0D1B2A). oklch(19.7% 0.017 224.8), rgb(13, 23, 27).
Aa
White text reads best on this color (18.17:1).
About this color
#0D171B is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.030 away. White text reads best on it, at 18.17:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.17:1 |
Values
| HEX | #0D171B |
| RGB | rgb(13, 23, 27) |
| HSL | hsl(197, 35%, 8%) |
| OKLCH | oklch(19.7% 0.017 224.8) |
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 #0D171B | 18.17:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #0D171B | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #0D171B text on white | 18.17:1 | AAA | Lc 104.9 | Preferred for body text |
| #0D171B 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBDF
oklch(88.6% 0.011 226)
-
Step 300
300
#B4C4CA
oklch(81% 0.019 222.2)
-
Step 400
400
#8CA5B0
oklch(70.6% 0.032 226.2)
-
Step 500
500
#708F9C
oklch(63.1% 0.04 225.4)
-
Step 600
600
#577987
oklch(55.5% 0.044 225.4)
-
Step 700
700
#476672
oklch(49.1% 0.041 224)
-
Step 800
800
#3B535D
oklch(42.7% 0.034 225.6)
-
Step 900
900
#33454C
oklch(37.8% 0.026 223.7)
-
Step 950
950 (this color)
#0D171B
oklch(19.7% 0.017 224.8)
#0D171B 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) | #15161B | 0.014 |
| Deuteranopia (no green cones) | #13151B | 0.012 |
| Tritanopia (no blue cones) | #081818 | 0.011 |
| Achromatopsia (no color) | #161616 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D171B
#0D171B
oklch(19.7% 0.017 224.8)
- #1C130F
#1C130F
oklch(19.7% 0.017 45.1)
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 #0D171B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.030
- Rich Navy #001219 ΔE 0.031
- Almost Black #070D0D ΔE 0.045
- Dark #1B2431 ΔE 0.063
- Jet #212529 ΔE 0.066
- Oxford Blue #1B263B ΔE 0.079
- Very Dark Brown #1D0200 ΔE 0.084
- Dark Brown #341C02 ΔE 0.090
Use #0D171B 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.