#181536
Closest named color: Rich Black (#0D1B2A). oklch(22% 0.062 284.2), rgb(24, 21, 54).
Aa
White text reads best on this color (17.50:1).
About this color
#181536 is a very dark, muted purple. In OKLCH its lightness is 22%, its chroma 0.062 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 17.50:1.
| Hue family | Purples |
| Lightness | very dark (22%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.50:1 |
Values
| HEX | #181536 |
| RGB | rgb(24, 21, 54) |
| HSL | hsl(245, 44%, 15%) |
| OKLCH | oklch(22% 0.062 284.2) |
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 #181536 | 17.50:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #181536 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #181536 text on white | 17.50:1 | AAA | Lc 104.2 | Preferred for body text |
| #181536 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D5D6F4
oklch(88.5% 0.041 284)
-
Step 300
300
#BABBEF
oklch(80.9% 0.073 283.8)
-
Step 400
400
#9896E7
oklch(70.7% 0.117 284.1)
-
Step 500
500
#807AE0
oklch(63.1% 0.15 283.9)
-
Step 600
600
#6B60CE
oklch(55.6% 0.164 284.2)
-
Step 700
700
#5A4FB2
oklch(49.2% 0.152 284.4)
-
Step 800
800
#494190
oklch(42.6% 0.126 284.3)
-
Step 900
900
#3D3873
oklch(37.7% 0.098 284.5)
-
Step 950
950 (this color)
#181536
oklch(22% 0.062 284.2)
#181536 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) | #061A37 | 0.029 |
| Deuteranopia (no green cones) | #051835 | 0.029 |
| Tritanopia (no blue cones) | #0E1C23 | 0.052 |
| Achromatopsia (no color) | #191919 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181536
#181536
oklch(22% 0.062 284.2)
- #1E1B00
#1E1B00
oklch(21.9% 0.046 103.8)
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 #181536, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Navy Blue #001146 ΔE 0.051
- Dark #1B2431 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.056
- Midnight Purple #280137 ΔE 0.057
- Very Dark Purple #2A0134 ΔE 0.060
- Dark Indigo #1F0954 ΔE 0.062
- Night Blue #040348 ΔE 0.069
Use #181536 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.