#18163C
Closest named color: Rich Black (#0D1B2A). oklch(22.8% 0.071 281.5), rgb(24, 22, 60).
Aa
White text reads best on this color (17.22:1).
About this color
#18163C is a very dark, moderately saturated purple. In OKLCH its lightness is 23%, its chroma 0.071 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.045 away. White text reads best on it, at 17.22:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.22:1 |
Values
| HEX | #18163C |
| RGB | rgb(24, 22, 60) |
| HSL | hsl(243, 46%, 16%) |
| OKLCH | oklch(22.8% 0.071 281.5) |
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 #18163C | 17.22:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #18163C | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #18163C text on white | 17.22:1 | AAA | Lc 104.0 | Preferred for body text |
| #18163C text on black | 1.21:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D3D6F8
oklch(88.5% 0.047 281.4)
-
Step 300
300
#B7BBF6
oklch(81% 0.083 281.3)
-
Step 400
400
#9395F2
oklch(70.7% 0.135 281.4)
-
Step 500
500
#7B78ED
oklch(63.2% 0.171 281.5)
-
Step 600
600
#665DDB
oklch(55.6% 0.186 281.7)
-
Step 700
700
#554CBE
oklch(49.1% 0.173 281.5)
-
Step 800
800
#453F9A
oklch(42.7% 0.144 281.4)
-
Step 900
900
#3A377A
oklch(37.8% 0.111 281.7)
-
Step 950
950 (this color)
#18163C
oklch(22.8% 0.071 281.5)
#18163C 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) | #021C3D | 0.032 |
| Deuteranopia (no green cones) | #001A3B | 0.034 |
| Tritanopia (no blue cones) | #091F26 | 0.062 |
| Achromatopsia (no color) | #1B1B1B | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18163C
#18163C
oklch(22.8% 0.071 281.5)
- #211D00
#211D00
oklch(22.8% 0.048 102.2)
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 #18163C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.045
- Navy Blue #001146 ΔE 0.045
- Dark Indigo #1F0954 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.053
- Dark #1B2431 ΔE 0.056
- Midnight Purple #280137 ΔE 0.059
- Very Dark Purple #2A0134 ΔE 0.063
- Night Blue #040348 ΔE 0.065
Use #18163C 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.