#171E28
Closest named color: Rich Black (#0D1B2A). oklch(23.3% 0.022 257.3), rgb(23, 30, 40).
Aa
White text reads best on this color (16.76:1).
About this color
#171E28 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.021 away. White text reads best on it, at 16.76:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.76:1 |
Values
| HEX | #171E28 |
| RGB | rgb(23, 30, 40) |
| HSL | hsl(215, 27%, 12%) |
| OKLCH | oklch(23.3% 0.022 257.3) |
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 #171E28 | 16.76:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #171E28 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #171E28 text on white | 16.76:1 | AAA | Lc 103.7 | Preferred for body text |
| #171E28 text on black | 1.25:1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3DAE3
oklch(88.6% 0.015 254.6)
-
Step 300
300
#B6C2D2
oklch(81% 0.026 255.6)
-
Step 400
400
#90A2BB
oklch(70.7% 0.042 256.6)
-
Step 500
500
#758BAA
oklch(63.1% 0.053 257)
-
Step 600
600
#5E7595
oklch(55.7% 0.057 256.7)
-
Step 700
700
#4D627F
oklch(49.1% 0.053 256.6)
-
Step 800
800
#3F5068
oklch(42.7% 0.045 257)
-
Step 900
900
#364254
oklch(37.6% 0.035 258.3)
-
Step 950
950 (this color)
#171E28
oklch(23.3% 0.022 257.3)
#171E28 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) | #1A1E28 | 0.005 |
| Deuteranopia (no green cones) | #191D28 | 0.005 |
| Tritanopia (no blue cones) | #122021 | 0.020 |
| Achromatopsia (no color) | #1E1E1E | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171E28
#171E28
oklch(23.3% 0.022 257.3)
- #231C12
#231C12
oklch(23.2% 0.021 76.3)
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 #171E28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.021
- Dark #1B2431 ΔE 0.026
- Jet #212529 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.042
- Rich Navy #001219 ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.075
- Dark Brown #341C02 ΔE 0.079
- Almost Black #070D0D ΔE 0.083
Use #171E28 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.