#171825
Closest named color: Rich Black (#0D1B2A). oklch(21.4% 0.026 280.6), rgb(23, 24, 37).
Aa
White text reads best on this color (17.59:1).
About this color
#171825 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.019 away. White text reads best on it, at 17.59:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.59:1 |
Values
| HEX | #171825 |
| RGB | rgb(23, 24, 37) |
| HSL | hsl(236, 23%, 12%) |
| OKLCH | oklch(21.4% 0.026 280.6) |
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 #171825 | 17.59:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #171825 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #171825 text on white | 17.59:1 | AAA | Lc 104.4 | Preferred for body text |
| #171825 text on black | 1.19:1 | 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
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D7D8E4
oklch(88.5% 0.016 282.2)
-
Step 300
300
#BCBFD4
oklch(80.9% 0.03 279.3)
-
Step 400
400
#9A9EBF
oklch(70.7% 0.048 279.7)
-
Step 500
500
#8286AF
oklch(63.2% 0.062 280.1)
-
Step 600
600
#6C6F9A
oklch(55.6% 0.067 280.9)
-
Step 700
700
#5A5D84
oklch(49.2% 0.062 280.4)
-
Step 800
800
#494C6B
oklch(42.7% 0.051 279.7)
-
Step 900
900
#3D3F57
oklch(37.6% 0.041 280.5)
-
Step 950
950 (this color)
#171825
oklch(21.4% 0.026 280.6)
#171825 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) | #141926 | 0.006 |
| Deuteranopia (no green cones) | #141825 | 0.005 |
| Tritanopia (no blue cones) | #131A1D | 0.021 |
| Achromatopsia (no color) | #191919 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171825
#171825
oklch(21.4% 0.026 280.6)
- #1C1A0B
#1C1A0B
oklch(21.5% 0.027 101.7)
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 #171825, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.019
- Dark #1B2431 ΔE 0.045
- Jet #212529 ΔE 0.051
- Rich Navy #001219 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.058
- Almost Black #070D0D ΔE 0.068
- Navy Blue #001146 ΔE 0.078
- Very Dark Purple #2A0134 ΔE 0.080
Use #171825 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.