#171827
Closest named color: Rich Black (#0D1B2A). oklch(21.6% 0.029 280.7), rgb(23, 24, 39).
Aa
White text reads best on this color (17.55:1).
About this color
#171827 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.018 away. White text reads best on it, at 17.55:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.55:1 |
Values
| HEX | #171827 |
| RGB | rgb(23, 24, 39) |
| HSL | hsl(236, 26%, 12%) |
| OKLCH | oklch(21.6% 0.029 280.7) |
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 #171827 | 17.55:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #171827 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #171827 text on white | 17.55:1 | AAA | Lc 104.4 | Preferred for body text |
| #171827 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D6D8E6
oklch(88.5% 0.019 279.5)
-
Step 300
300
#BCBFD7
oklch(81% 0.034 280)
-
Step 400
400
#9A9DC3
oklch(70.7% 0.055 281.3)
-
Step 500
500
#8185B4
oklch(63.1% 0.071 280.4)
-
Step 600
600
#6B6EA0
oklch(55.6% 0.077 280.9)
-
Step 700
700
#595C89
oklch(49.1% 0.072 280.5)
-
Step 800
800
#494B6F
oklch(42.7% 0.06 281.1)
-
Step 900
900
#3D3F5A
oklch(37.8% 0.046 280.7)
-
Step 950
950 (this color)
#171827
oklch(21.6% 0.029 280.7)
#171827 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) | #141A28 | 0.008 |
| Deuteranopia (no green cones) | #131927 | 0.007 |
| Tritanopia (no blue cones) | #131B1D | 0.027 |
| Achromatopsia (no color) | #191919 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171827
#171827
oklch(21.6% 0.029 280.7)
- #1D1A09
#1D1A09
oklch(21.6% 0.03 99.5)
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 #171827, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.018
- Dark #1B2431 ΔE 0.044
- Jet #212529 ΔE 0.051
- Rich Navy #001219 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.056
- Almost Black #070D0D ΔE 0.070
- Navy Blue #001146 ΔE 0.075
- Very Dark Purple #2A0134 ΔE 0.078
Use #171827 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.