#170F1B
Closest named color: Rich Navy (#001219). oklch(18.5% 0.027 314.1), rgb(23, 15, 27).
Aa
White text reads best on this color (18.74:1).
About this color
#170F1B is a very dark close to neutral grey. In OKLCH its lightness is 18%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.045 away. White text reads best on it, at 18.74:1.
| Hue family | Neutrals |
| Lightness | very dark (18%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.12:1 |
| White text | 18.74:1 |
Values
| HEX | #170F1B |
| RGB | rgb(23, 15, 27) |
| HSL | hsl(280, 29%, 8%) |
| OKLCH | oklch(18.5% 0.027 314.1) |
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 #170F1B | 18.74:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #170F1B | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #170F1B text on white | 18.74:1 | AAA | Lc 105.2 | Preferred for body text |
| #170F1B 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#ECE8EE
oklch(93.6% 0.009 314.8)
-
Step 200
200
#DDD6E1
oklch(88.5% 0.017 313.6)
-
Step 300
300
#C8BBCF
oklch(80.9% 0.031 314)
-
Step 400
400
#AC98B7
oklch(70.7% 0.05 313.6)
-
Step 500
500
#987EA5
oklch(63.1% 0.065 314.3)
-
Step 600
600
#836790
oklch(55.6% 0.07 314.9)
-
Step 700
700
#6E557B
oklch(49% 0.066 313.8)
-
Step 800
800
#5A4664
oklch(42.7% 0.055 314.2)
-
Step 900
900
#4A3B51
oklch(37.7% 0.042 314.9)
-
Step 950
950 (this color)
#170F1B
oklch(18.5% 0.027 314.1)
#170F1B 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) | #0D111B | 0.021 |
| Deuteranopia (no green cones) | #0F121B | 0.019 |
| Tritanopia (no blue cones) | #171113 | 0.020 |
| Achromatopsia (no color) | #121212 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #170F1B
#170F1B
oklch(18.5% 0.027 314.1)
- #0E1509
#0E1509
oklch(18.4% 0.026 133)
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 #170F1B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.045
- Almost Black #070D0D ΔE 0.046
- Rich Black #0D1B2A ΔE 0.047
- Very Dark Brown #1D0200 ΔE 0.065
- Very Dark Purple #2A0134 ΔE 0.076
- Dark #1B2431 ΔE 0.077
- Midnight Purple #280137 ΔE 0.078
- Jet #212529 ΔE 0.081
Use #170F1B 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.