#171017
Closest named color: Almost Black (#070D0D). oklch(18.5% 0.018 326.3), rgb(23, 16, 23).
Aa
White text reads best on this color (18.70:1).
About this color
#171017 is a very dark close to neutral grey. In OKLCH its lightness is 19%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.042 away. White text reads best on it, at 18.70:1.
| Hue family | Neutrals |
| Lightness | very dark (19%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.12:1 |
| White text | 18.70:1 |
Values
| HEX | #171017 |
| RGB | rgb(23, 16, 23) |
| HSL | hsl(300, 18%, 8%) |
| OKLCH | oklch(18.5% 0.018 326.3) |
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 #171017 | 18.70:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #171017 | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #171017 text on white | 18.70:1 | AAA | Lc 105.2 | Preferred for body text |
| #171017 text on black | 1.12:1 | 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
#DDD6DD
oklch(88.4% 0.012 325.7)
-
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
#988198
oklch(63.2% 0.043 326.1)
-
Step 600
600
#826A82
oklch(55.6% 0.047 326.2)
-
Step 700
700
#6E586E
oklch(49% 0.044 326.2)
-
Step 800
800
#5A485A
oklch(42.7% 0.037 326.2)
-
Step 900
900
#4A3D4A
oklch(37.9% 0.028 326.1)
-
Step 950
950 (this color)
#171017
oklch(18.5% 0.018 326.3)
#171017 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) | #101217 | 0.015 |
| Deuteranopia (no green cones) | #111317 | 0.016 |
| Tritanopia (no blue cones) | #171112 | 0.012 |
| Achromatopsia (no color) | #121212 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171017
#171017
oklch(18.5% 0.018 326.3)
- #0E150E
#0E150E
oklch(18.6% 0.018 144.8)
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 #171017, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.042
- Rich Navy #001219 ΔE 0.043
- Rich Black #0D1B2A ΔE 0.048
- Very Dark Brown #1D0200 ΔE 0.061
- Dark #1B2431 ΔE 0.078
- Jet #212529 ΔE 0.079
- Very Dark Purple #2A0134 ΔE 0.085
- Midnight Purple #280137 ΔE 0.087
Use #171017 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.