#18163A
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.067 282.1), rgb(24, 22, 58).
Aa
White text reads best on this color (17.28:1).
About this color
#18163A is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.067 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.042 away. White text reads best on it, at 17.28:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.28:1 |
Values
| HEX | #18163A |
| RGB | rgb(24, 22, 58) |
| HSL | hsl(243, 45%, 16%) |
| OKLCH | oklch(22.6% 0.067 282.1) |
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 #18163A | 17.28:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #18163A | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #18163A text on white | 17.28:1 | AAA | Lc 104.0 | Preferred for body text |
| #18163A 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
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D4D6F7
oklch(88.5% 0.045 282.7)
-
Step 300
300
#B8BBF4
oklch(81% 0.08 282.1)
-
Step 400
400
#9496EE
oklch(70.8% 0.128 281.6)
-
Step 500
500
#7C79E8
oklch(63.1% 0.163 281.9)
-
Step 600
600
#675FD6
oklch(55.6% 0.177 282)
-
Step 700
700
#564DBA
oklch(49.1% 0.166 282.1)
-
Step 800
800
#464096
oklch(42.7% 0.136 282.1)
-
Step 900
900
#3A3778
oklch(37.6% 0.108 282)
-
Step 950
950 (this color)
#18163A
oklch(22.6% 0.067 282.1)
#18163A 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) | #041C3B | 0.031 |
| Deuteranopia (no green cones) | #021939 | 0.032 |
| Tritanopia (no blue cones) | #0B1E25 | 0.058 |
| Achromatopsia (no color) | #1B1B1B | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18163A
#18163A
oklch(22.6% 0.067 282.1)
- #201C00
#201C00
oklch(22.4% 0.047 102)
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 #18163A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.042
- Navy Blue #001146 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.053
- Dark #1B2431 ΔE 0.054
- Dark Indigo #1F0954 ΔE 0.056
- Midnight Purple #280137 ΔE 0.059
- Very Dark Purple #2A0134 ΔE 0.062
- Night Blue #040348 ΔE 0.067
Use #18163A 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.