#21101E
Closest named color: Rich Black (#0D1B2A). oklch(20.4% 0.038 333.5), rgb(33, 16, 30).
Aa
White text reads best on this color (18.14:1).
About this color
#21101E is a very dark, muted purple. In OKLCH its lightness is 20%, its chroma 0.038 and its hue 334°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.050 away. White text reads best on it, at 18.14:1.
| Hue family | Purples |
| Lightness | very dark (20%) |
| Chroma | muted (0.038) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.14:1 |
Values
| HEX | #21101E |
| RGB | rgb(33, 16, 30) |
| HSL | hsl(311, 35%, 10%) |
| OKLCH | oklch(20.4% 0.038 333.5) |
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 #21101E | 18.14:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #21101E | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #21101E text on white | 18.14:1 | AAA | Lc 104.8 | Preferred for body text |
| #21101E text on black | 1.15:1 | 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
#F8F4F7
oklch(97.1% 0.006 334)
-
Step 100
100
#EFE7ED
oklch(93.6% 0.012 334.1)
-
Step 200
200
#E4D3E0
oklch(88.4% 0.026 333.8)
-
Step 300
300
#D3B6CD
oklch(80.8% 0.045 333.1)
-
Step 400
400
#BC90B3
oklch(70.6% 0.071 333.6)
-
Step 500
500
#AB74A1
oklch(63% 0.092 333.3)
-
Step 600
600
#965C8C
oklch(55.6% 0.1 333.3)
-
Step 700
700
#804C77
oklch(49.2% 0.092 333.4)
-
Step 800
800
#683E60
oklch(42.6% 0.077 334.1)
-
Step 900
900
#55354F
oklch(37.7% 0.061 333.7)
-
Step 950
950 (this color)
#21101E
oklch(20.4% 0.038 333.5)
#21101E 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) | #10141F | 0.036 |
| Deuteranopia (no green cones) | #14171D | 0.035 |
| Tritanopia (no blue cones) | #221115 | 0.020 |
| Achromatopsia (no color) | #161616 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21101E
#21101E
oklch(20.4% 0.038 333.5)
- #071C0F
#071C0F
oklch(20.4% 0.038 154.4)
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 #21101E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.050
- Very Dark Purple #2A0134 ΔE 0.063
- Rich Navy #001219 ΔE 0.067
- Midnight Purple #280137 ΔE 0.067
- Dark #1B2431 ΔE 0.068
- Almost Black #070D0D ΔE 0.068
- Jet #212529 ΔE 0.070
- Very Dark Brown #1D0200 ΔE 0.071
Use #21101E 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.