#643D66
Closest named color: Brownish Purple (#76424E). oklch(42.2% 0.082 325.2), rgb(100, 61, 102).
Aa
White text reads best on this color (8.74:1).
About this color
#643D66 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.082 and its hue 325°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.059 away. White text reads best on it, at 8.74:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.082) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.40:1 |
| White text | 8.74:1 |
Values
| HEX | #643D66 |
| RGB | rgb(100, 61, 102) |
| HSL | hsl(297, 25%, 32%) |
| OKLCH | oklch(42.2% 0.082 325.2) |
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 #643D66 | 8.74:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #643D66 | 2.40:1 | Fails | Lc 14.2 | Not readable |
| #643D66 text on white | 8.74:1 | AAA | Lc 89.8 | Fine for body text |
| #643D66 text on black | 2.40:1 | Fails | Lc -12.5 | 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
#EFE7EF
oklch(93.7% 0.014 325.7)
-
Step 200
200
#E3D3E3
oklch(88.5% 0.028 325.8)
-
Step 300
300
#D1B7D2
oklch(81% 0.047 324.9)
-
Step 400
400
#B990BB
oklch(70.6% 0.077 324.8)
-
Step 500
500
#A874AA
oklch(63.1% 0.099 325.4)
-
Step 600
600
#925C95
oklch(55.5% 0.106 325)
-
Step 700
700
#7D4C7F
oklch(49.2% 0.098 325.6)
-
Step 800
800 (this color)
#643D66
oklch(42.2% 0.082 325.2)
-
Step 900
900
#533554
oklch(37.7% 0.064 325.7)
-
Step 950
950
#301F31
oklch(26.8% 0.041 324.7)
#643D66 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) | #394868 | 0.076 |
| Deuteranopia (no green cones) | #434D65 | 0.069 |
| Tritanopia (no blue cones) | #66414D | 0.047 |
| Achromatopsia (no color) | #4B4B4B | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643D66
#643D66
oklch(42.2% 0.082 325.2)
- #2E5931
#2E5931
oklch(42.1% 0.081 145.4)
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 #643D66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.059
- Purple Brown #673A3F ΔE 0.064
- Dusty Grape #545775 ΔE 0.073
- Dusk #4E5481 ΔE 0.074
- Twilight #4E518B ΔE 0.078
- Dark Slate Blue #483D8B ΔE 0.081
- Dark Mauve #874C62 ΔE 0.084
- Light Eggplant #894585 ΔE 0.089
Use #643D66 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.