#21121D
Closest named color: Rich Black (#0D1B2A). oklch(20.8% 0.032 337), rgb(33, 18, 29).
Aa
White text reads best on this color (17.96:1).
About this color
#21121D is a very dark, muted purple. In OKLCH its lightness is 21%, its chroma 0.032 and its hue 337°. Its hue sits on the warm side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.047 away. White text reads best on it, at 17.96:1.
| Hue family | Purples |
| Lightness | very dark (21%) |
| Chroma | muted (0.032) |
| Temperature | warm |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.96:1 |
Values
| HEX | #21121D |
| RGB | rgb(33, 18, 29) |
| HSL | hsl(316, 29%, 10%) |
| OKLCH | oklch(20.8% 0.032 337) |
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 #21121D | 17.96:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #21121D | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #21121D text on white | 17.96:1 | AAA | Lc 104.7 | Preferred for body text |
| #21121D text on black | 1.16:1 | 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
#EFE7EC
oklch(93.6% 0.011 339.3)
-
Step 200
200
#E3D4DE
oklch(88.5% 0.021 337.7)
-
Step 300
300
#D1B8C9
oklch(80.9% 0.037 337.6)
-
Step 400
400
#BA93AE
oklch(70.8% 0.059 337.7)
-
Step 500
500
#A8789A
oklch(63.2% 0.076 337.6)
-
Step 600
600
#936085
oklch(55.6% 0.084 337.3)
-
Step 700
700
#7D4F71
oklch(49.1% 0.078 336.9)
-
Step 800
800
#65415C
oklch(42.6% 0.064 336.2)
-
Step 900
900
#53374B
oklch(37.7% 0.05 337.6)
-
Step 950
950 (this color)
#21121D
oklch(20.8% 0.032 337)
#21121D 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) | #12151D | 0.032 |
| Deuteranopia (no green cones) | #16181D | 0.029 |
| Tritanopia (no blue cones) | #231216 | 0.015 |
| Achromatopsia (no color) | #171717 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21121D
#21121D
oklch(20.8% 0.032 337)
- #0A1C12
#0A1C12
oklch(20.7% 0.031 157.8)
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 #21121D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.047
- Dark #1B2431 ΔE 0.063
- Jet #212529 ΔE 0.064
- Rich Navy #001219 ΔE 0.065
- Almost Black #070D0D ΔE 0.068
- Very Dark Purple #2A0134 ΔE 0.069
- Very Dark Brown #1D0200 ΔE 0.073
- Midnight Purple #280137 ΔE 0.073
Use #21121D 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.