#180E21
Closest named color: Rich Black (#0D1B2A). oklch(18.8% 0.04 307.2), rgb(24, 14, 33).
Aa
White text reads best on this color (18.68:1).
About this color
#180E21 is a very dark, muted purple. In OKLCH its lightness is 19%, its chroma 0.040 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.047 away. White text reads best on it, at 18.68:1.
| Hue family | Purples |
| Lightness | very dark (19%) |
| Chroma | muted (0.040) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.12:1 |
| White text | 18.68:1 |
Values
| HEX | #180E21 |
| RGB | rgb(24, 14, 33) |
| HSL | hsl(272, 40%, 9%) |
| OKLCH | oklch(18.8% 0.04 307.2) |
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 #180E21 | 18.68:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #180E21 | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #180E21 text on white | 18.68:1 | AAA | Lc 105.2 | Preferred for body text |
| #180E21 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
#ECE8F1
oklch(93.7% 0.013 306)
-
Step 200
200
#DED5E7
oklch(88.6% 0.026 308.1)
-
Step 300
300
#C9B9D9
oklch(80.9% 0.048 307.8)
-
Step 400
400
#AD94C6
oklch(70.6% 0.077 307.3)
-
Step 500
500
#997AB7
oklch(63.2% 0.096 307.1)
-
Step 600
600
#8462A3
oklch(55.7% 0.105 307.4)
-
Step 700
700
#6F518C
oklch(49.1% 0.097 306.6)
-
Step 800
800
#5B4271
oklch(42.7% 0.081 307.8)
-
Step 900
900
#4A385C
oklch(37.6% 0.064 306.5)
-
Step 950
950 (this color)
#180E21
oklch(18.8% 0.04 307.2)
#180E21 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) | #0A1222 | 0.029 |
| Deuteranopia (no green cones) | #0C1220 | 0.027 |
| Tritanopia (no blue cones) | #171115 | 0.030 |
| Achromatopsia (no color) | #121212 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180E21
#180E21
oklch(18.8% 0.04 307.2)
- #0E1603
#0E1603
oklch(18.6% 0.039 127.3)
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 #180E21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.047
- Rich Navy #001219 ΔE 0.052
- Almost Black #070D0D ΔE 0.057
- Very Dark Purple #2A0134 ΔE 0.064
- Midnight Purple #280137 ΔE 0.065
- Very Dark Brown #1D0200 ΔE 0.075
- Midnight #03012D ΔE 0.076
- Dark #1B2431 ΔE 0.077
Use #180E21 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.