#180D23
Closest named color: Rich Black (#0D1B2A). oklch(18.7% 0.045 305.5), rgb(24, 13, 35).
Aa
White text reads best on this color (18.73:1).
About this color
#180D23 is a very dark, muted purple. In OKLCH its lightness is 19%, its chroma 0.045 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 0.049 away. White text reads best on it, at 18.73:1.
| Hue family | Purples |
| Lightness | very dark (19%) |
| Chroma | muted (0.045) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.12:1 |
| White text | 18.73:1 |
Values
| HEX | #180D23 |
| RGB | rgb(24, 13, 35) |
| HSL | hsl(270, 46%, 9%) |
| OKLCH | oklch(18.7% 0.045 305.5) |
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 #180D23 | 18.73:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #180D23 | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #180D23 text on white | 18.73:1 | AAA | Lc 105.2 | Preferred for body text |
| #180D23 text on black | 1.12:1 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE7F2
oklch(93.5% 0.016 306.4)
-
Step 200
200
#DED4E9
oklch(88.4% 0.03 307.1)
-
Step 300
300
#C9B8DD
oklch(80.9% 0.054 306)
-
Step 400
400
#AD93CC
oklch(70.7% 0.086 305.1)
-
Step 500
500
#9977BE
oklch(63% 0.11 305.5)
-
Step 600
600
#845FAB
oklch(55.6% 0.12 305.3)
-
Step 700
700
#704E92
oklch(49% 0.111 305.8)
-
Step 800
800
#5B4077
oklch(42.6% 0.093 305.4)
-
Step 900
900
#4B3760
oklch(37.7% 0.072 305.7)
-
Step 950
950 (this color)
#180D23
oklch(18.7% 0.045 305.5)
#180D23 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) | #071224 | 0.034 |
| Deuteranopia (no green cones) | #0A1222 | 0.031 |
| Tritanopia (no blue cones) | #161116 | 0.034 |
| Achromatopsia (no color) | #121212 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180D23
#180D23
oklch(18.7% 0.045 305.5)
- #0E1601
#0E1601
oklch(18.5% 0.044 125.7)
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 #180D23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.049
- Rich Navy #001219 ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.060
- Almost Black #070D0D ΔE 0.060
- Midnight Purple #280137 ΔE 0.061
- Midnight #03012D ΔE 0.072
- Dark Navy #000435 ΔE 0.074
- Dark Navy Blue #00022E ΔE 0.077
Use #180D23 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.