#21172E
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.045 303), rgb(33, 23, 46).
Aa
White text reads best on this color (17.11:1).
About this color
#21172E is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.045 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 17.11:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.045) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.11:1 |
Values
| HEX | #21172E |
| RGB | rgb(33, 23, 46) |
| HSL | hsl(266, 33%, 14%) |
| OKLCH | oklch(22.9% 0.045 303) |
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 #21172E | 17.11:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #21172E | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #21172E text on white | 17.11:1 | AAA | Lc 104.0 | Preferred for body text |
| #21172E text on black | 1.22:1 | 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
#ECE8F3
oklch(93.7% 0.015 302.5)
-
Step 200
200
#DDD5EA
oklch(88.6% 0.03 303)
-
Step 300
300
#C7B9DE
oklch(80.9% 0.054 302.4)
-
Step 400
400
#AB94CD
oklch(70.7% 0.085 302.8)
-
Step 500
500
#9778C0
oklch(63% 0.11 303.2)
-
Step 600
600
#8260AC
oklch(55.6% 0.119 303.4)
-
Step 700
700
#6E4F94
oklch(49.1% 0.111 303.3)
-
Step 800
800
#594178
oklch(42.6% 0.092 302.8)
-
Step 900
900
#493861
oklch(37.8% 0.071 302.2)
-
Step 950
950 (this color)
#21172E
oklch(22.9% 0.045 303)
#21172E 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) | #111B2F | 0.030 |
| Deuteranopia (no green cones) | #131C2D | 0.029 |
| Tritanopia (no blue cones) | #1F1B20 | 0.035 |
| Achromatopsia (no color) | #1C1C1C | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21172E
#21172E
oklch(22.9% 0.045 303)
- #192006
#192006
oklch(22.9% 0.045 122.5)
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 #21172E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Dark #1B2431 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.050
- Jet #212529 ΔE 0.052
- Very Dark Purple #2A0134 ΔE 0.060
- Midnight Purple #280137 ΔE 0.060
- Eggplant #380835 ΔE 0.061
- Dark Purple #35063E ΔE 0.065
Use #21172E 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.