#180B24
Closest named color: Rich Black (#0D1B2A). oklch(18.3% 0.051 306), rgb(24, 11, 36).
Aa
White text reads best on this color (18.88:1).
About this color
#180B24 is a very dark, muted purple. In OKLCH its lightness is 18%, its chroma 0.051 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.055 away. White text reads best on it, at 18.88:1.
| Hue family | Purples |
| Lightness | very dark (18%) |
| Chroma | muted (0.051) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.11:1 |
| White text | 18.88:1 |
Values
| HEX | #180B24 |
| RGB | rgb(24, 11, 36) |
| HSL | hsl(271, 53%, 9%) |
| OKLCH | oklch(18.3% 0.051 306) |
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 #180B24 | 18.88:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #180B24 | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #180B24 text on white | 18.88:1 | AAA | Lc 105.3 | Preferred for body text |
| #180B24 text on black | 1.11:1 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DED4EB
oklch(88.5% 0.033 305.3)
-
Step 300
300
#CAB7E0
oklch(80.9% 0.06 306.1)
-
Step 400
400
#B091D1
oklch(70.8% 0.097 306.2)
-
Step 500
500
#9C74C5
oklch(63.1% 0.125 305.9)
-
Step 600
600
#875BB1
oklch(55.5% 0.136 306.1)
-
Step 700
700
#734B98
oklch(49.2% 0.125 306.3)
-
Step 800
800
#5D3E7C
oklch(42.8% 0.104 305.5)
-
Step 900
900
#4C3563
oklch(37.6% 0.081 305.9)
-
Step 950
950 (this color)
#180B24
oklch(18.3% 0.051 306)
#180B24 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) | #041125 | 0.041 |
| Deuteranopia (no green cones) | #071123 | 0.037 |
| Tritanopia (no blue cones) | #161015 | 0.039 |
| Achromatopsia (no color) | #111111 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180B24
#180B24
oklch(18.3% 0.051 306)
- #0D1600
#0D1600
oklch(18.4% 0.047 126.5)
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 #180B24, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.057
- Midnight Purple #280137 ΔE 0.057
- Rich Navy #001219 ΔE 0.059
- Almost Black #070D0D ΔE 0.064
- Midnight #03012D ΔE 0.068
- Dark Navy #000435 ΔE 0.071
- Dark Navy Blue #00022E ΔE 0.074
Use #180B24 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.