#181730
Closest named color: Rich Black (#0D1B2A). oklch(22% 0.048 283.5), rgb(24, 23, 48).
Aa
White text reads best on this color (17.44:1).
About this color
#181730 is a very dark, muted purple. In OKLCH its lightness is 22%, its chroma 0.048 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 17.44:1.
| Hue family | Purples |
| Lightness | very dark (22%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.44:1 |
Values
| HEX | #181730 |
| RGB | rgb(24, 23, 48) |
| HSL | hsl(242, 35%, 14%) |
| OKLCH | oklch(22% 0.048 283.5) |
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 #181730 | 17.44:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #181730 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #181730 text on white | 17.44:1 | AAA | Lc 104.2 | Preferred for body text |
| #181730 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D6D7EE
oklch(88.5% 0.031 283.8)
-
Step 300
300
#BBBCE5
oklch(80.8% 0.058 283.9)
-
Step 400
400
#9999D8
oklch(70.7% 0.092 283.8)
-
Step 500
500
#817FCD
oklch(63.1% 0.116 283.7)
-
Step 600
600
#6B67BA
oklch(55.6% 0.126 283.7)
-
Step 700
700
#5955A0
oklch(49% 0.117 283.6)
-
Step 800
800
#494682
oklch(42.7% 0.097 283.7)
-
Step 900
900
#3D3B68
oklch(37.6% 0.076 284.2)
-
Step 950
950 (this color)
#181730
oklch(22% 0.048 283.5)
#181730 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) | #0E1B31 | 0.019 |
| Deuteranopia (no green cones) | #0D192F | 0.019 |
| Tritanopia (no blue cones) | #111C21 | 0.041 |
| Achromatopsia (no color) | #1A1A1A | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181730
#181730
oklch(22% 0.048 283.5)
- #1F1B00
#1F1B00
oklch(22% 0.046 101.8)
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 #181730, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Dark #1B2431 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.052
- Jet #212529 ΔE 0.058
- Navy Blue #001146 ΔE 0.061
- Midnight Purple #280137 ΔE 0.065
- Very Dark Purple #2A0134 ΔE 0.066
- Rich Navy #001219 ΔE 0.067
Use #181730 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.