#643866
Closest named color: Brownish Purple (#76424E). oklch(41.3% 0.092 325.5), rgb(100, 56, 102).
Aa
White text reads best on this color (9.13:1).
About this color
#643866 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.092 and its hue 326°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.067 away. White text reads best on it, at 9.13:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #643866 |
| RGB | rgb(100, 56, 102) |
| HSL | hsl(297, 29%, 31%) |
| OKLCH | oklch(41.3% 0.092 325.5) |
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 #643866 | 9.13:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #643866 | 2.29:1 | Fails | Lc 13.2 | Not readable |
| #643866 text on white | 9.13:1 | AAA | Lc 90.8 | Preferred for body text |
| #643866 text on black | 2.29:1 | Fails | Lc -11.5 | 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 800.
-
Step 50
50
#F8F4F8
oklch(97.1% 0.007 325.6)
-
Step 100
100
#EFE6F0
oklch(93.5% 0.016 322.7)
-
Step 200
200
#E4D3E4
oklch(88.6% 0.029 325.8)
-
Step 300
300
#D3B5D4
oklch(80.9% 0.054 325.1)
-
Step 400
400
#BC8EBE
oklch(70.6% 0.086 325.1)
-
Step 500
500
#AB71AD
oklch(63% 0.11 325.6)
-
Step 600
600
#965999
oklch(55.6% 0.118 325.3)
-
Step 700
700
#804882
oklch(49% 0.111 325.9)
-
Step 800
800 (this color)
#643866
oklch(41.3% 0.092 325.5)
-
Step 900
900
#553356
oklch(37.6% 0.072 325.9)
-
Step 950
950
#321E32
oklch(26.9% 0.046 326.8)
#643866 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) | #344568 | 0.086 |
| Deuteranopia (no green cones) | #404A65 | 0.077 |
| Tritanopia (no blue cones) | #663D4A | 0.054 |
| Achromatopsia (no color) | #484848 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643866
#643866
oklch(41.3% 0.092 325.5)
- #26582A
#26582A
oklch(41.3% 0.092 145.2)
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 #643866, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.067
- Purple Brown #673A3F ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.080
- Grape Purple #5D1451 ΔE 0.082
- Velvet #750851 ΔE 0.083
- Dusk #4E5481 ΔE 0.084
- Dusty Grape #545775 ΔE 0.086
- Twilight #4E518B ΔE 0.086
Use #643866 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.