#21182C
Closest named color: Rich Black (#0D1B2A). oklch(23% 0.04 304.2), rgb(33, 24, 44).
Aa
White text reads best on this color (17.04:1).
About this color
#21182C is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.040 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.036 away. White text reads best on it, at 17.04:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.040) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.04:1 |
Values
| HEX | #21182C |
| RGB | rgb(33, 24, 44) |
| HSL | hsl(267, 29%, 13%) |
| OKLCH | oklch(23% 0.04 304.2) |
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 #21182C | 17.04:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #21182C | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #21182C text on white | 17.04:1 | AAA | Lc 103.9 | Preferred for body text |
| #21182C text on black | 1.23:1 | 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
#DDD5E8
oklch(88.5% 0.027 304.8)
-
Step 300
300
#C7BADA
oklch(81% 0.047 303.8)
-
Step 400
400
#AB95C7
oklch(70.7% 0.076 304.6)
-
Step 500
500
#967BB9
oklch(63.2% 0.096 303.8)
-
Step 600
600
#8163A5
oklch(55.7% 0.105 304.1)
-
Step 700
700
#6D528D
oklch(49.2% 0.096 304.2)
-
Step 800
800
#594373
oklch(42.7% 0.081 304.3)
-
Step 900
900
#49395D
oklch(37.8% 0.063 304)
-
Step 950
950 (this color)
#21182C
oklch(23% 0.04 304.2)
#21182C 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) | #141C2D | 0.026 |
| Deuteranopia (no green cones) | #151C2B | 0.025 |
| Tritanopia (no blue cones) | #1F1B1F | 0.031 |
| Achromatopsia (no color) | #1C1C1C | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21182C
#21182C
oklch(23% 0.04 304.2)
- #19200A
#19200A
oklch(23% 0.039 124.1)
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 #21182C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.036
- Dark #1B2431 ΔE 0.040
- Jet #212529 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.049
- Eggplant #380835 ΔE 0.064
- Very Dark Purple #2A0134 ΔE 0.064
- Midnight Purple #280137 ΔE 0.066
- Dark Purple #35063E ΔE 0.069
Use #21182C 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.