#171925
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.024 276.9), rgb(23, 25, 37).
Aa
White text reads best on this color (17.46:1).
About this color
#171925 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.017 away. White text reads best on it, at 17.46:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.46:1 |
Values
| HEX | #171925 |
| RGB | rgb(23, 25, 37) |
| HSL | hsl(231, 23%, 12%) |
| OKLCH | oklch(21.7% 0.024 276.9) |
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 #171925 | 17.46:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #171925 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #171925 text on white | 17.46:1 | AAA | Lc 104.3 | Preferred for body text |
| #171925 text on black | 1.20:1 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9EF
oklch(93.5% 0.008 278.6)
-
Step 200
200
#D6D8E4
oklch(88.4% 0.017 278.5)
-
Step 300
300
#BBBFD3
oklch(80.8% 0.028 276.7)
-
Step 400
400
#999FBD
oklch(70.8% 0.044 276.3)
-
Step 500
500
#8087AD
oklch(63.2% 0.058 276.5)
-
Step 600
600
#6A7098
oklch(55.6% 0.063 277.6)
-
Step 700
700
#585E82
oklch(49.1% 0.058 276.7)
-
Step 800
800
#484D6A
oklch(42.8% 0.049 276.6)
-
Step 900
900
#3C4056
oklch(37.7% 0.038 276.4)
-
Step 950
950 (this color)
#171925
oklch(21.7% 0.024 276.9)
#171925 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) | #151A26 | 0.005 |
| Deuteranopia (no green cones) | #151925 | 0.004 |
| Tritanopia (no blue cones) | #131B1D | 0.021 |
| Achromatopsia (no color) | #1A1A1A | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171925
#171925
oklch(21.7% 0.024 276.9)
- #1D1A0D
#1D1A0D
oklch(21.7% 0.024 96.7)
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 #171925, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.017
- Dark #1B2431 ΔE 0.042
- Jet #212529 ΔE 0.048
- Rich Navy #001219 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.056
- Almost Black #070D0D ΔE 0.069
- Navy Blue #001146 ΔE 0.080
- Very Dark Purple #2A0134 ΔE 0.083
Use #171925 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.