#16171F
Closest named color: Rich Black (#0D1B2A). oklch(20.7% 0.016 279.3), rgb(22, 23, 31).
Aa
White text reads best on this color (17.85:1).
About this color
#16171F is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.025 away. White text reads best on it, at 17.85:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.85:1 |
Values
| HEX | #16171F |
| RGB | rgb(22, 23, 31) |
| HSL | hsl(233, 17%, 10%) |
| OKLCH | oklch(20.7% 0.016 279.3) |
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 #16171F | 17.85:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #16171F | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #16171F text on white | 17.85:1 | AAA | Lc 104.6 | Preferred for body text |
| #16171F text on black | 1.17:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9ED
oklch(93.5% 0.005 286.3)
-
Step 200
200
#D7D8E0
oklch(88.4% 0.011 280.5)
-
Step 300
300
#BEC0CD
oklch(81% 0.018 279)
-
Step 400
400
#9C9FB4
oklch(70.7% 0.031 279.1)
-
Step 500
500
#8487A1
oklch(63% 0.039 280)
-
Step 600
600
#6E718C
oklch(55.6% 0.042 280)
-
Step 700
700
#5C5F77
oklch(49.2% 0.038 279.3)
-
Step 800
800
#4B4D61
oklch(42.6% 0.033 280.4)
-
Step 900
900
#3E404F
oklch(37.6% 0.026 279.1)
-
Step 950
950 (this color)
#16171F
oklch(20.7% 0.016 279.3)
#16171F 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) | #15181F | 0.004 |
| Deuteranopia (no green cones) | #14171F | 0.004 |
| Tritanopia (no blue cones) | #14181A | 0.013 |
| Achromatopsia (no color) | #171717 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #16171F
#16171F
oklch(20.7% 0.016 279.3)
- #19180F
#19180F
oklch(20.7% 0.017 102.4)
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 #16171F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.025
- Rich Navy #001219 ΔE 0.046
- Dark #1B2431 ΔE 0.053
- Jet #212529 ΔE 0.056
- Almost Black #070D0D ΔE 0.058
- Oxford Blue #1B263B ΔE 0.068
- Dark Brown #341C02 ΔE 0.082
- Very Dark Brown #1D0200 ΔE 0.084
Use #16171F 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.