#643D6D
Closest named color: Brownish Purple (#76424E). oklch(42.6% 0.09 319.9), rgb(100, 61, 109).
Aa
White text reads best on this color (8.64:1).
About this color
#643D6D is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.090 and its hue 320°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.068 away. White text reads best on it, at 8.64:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.43:1 |
| White text | 8.64:1 |
Values
| HEX | #643D6D |
| RGB | rgb(100, 61, 109) |
| HSL | hsl(289, 28%, 33%) |
| OKLCH | oklch(42.6% 0.09 319.9) |
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 #643D6D | 8.64:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #643D6D | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #643D6D text on white | 8.64:1 | AAA | Lc 89.5 | Fine for body text |
| #643D6D text on black | 2.43:1 | Fails | Lc -12.8 | 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
#EFE7F0
oklch(93.7% 0.015 322.3)
-
Step 200
200
#E2D3E5
oklch(88.4% 0.029 320.6)
-
Step 300
300
#D0B6D6
oklch(80.8% 0.053 319.9)
-
Step 400
400
#B890C2
oklch(70.8% 0.084 319.5)
-
Step 500
500
#A673B2
oklch(63% 0.108 319.8)
-
Step 600
600
#915B9E
oklch(55.6% 0.117 319.7)
-
Step 700
700
#7B4A87
oklch(49% 0.109 319.5)
-
Step 800
800 (this color)
#643D6D
oklch(42.6% 0.09 319.9)
-
Step 900
900
#523559
oklch(37.8% 0.07 319.7)
-
Step 950
950
#301F34
oklch(27% 0.045 319.8)
#643D6D 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) | #36496F | 0.080 |
| Deuteranopia (no green cones) | #414D6C | 0.071 |
| Tritanopia (no blue cones) | #654350 | 0.056 |
| Achromatopsia (no color) | #4C4C4C | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643D6D
#643D6D
oklch(42.6% 0.09 319.9)
- #325A29
#325A29
oklch(42.5% 0.089 140)
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 #643D6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.068
- Dusk #4E5481 ΔE 0.071
- Twilight #4E518B ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.072
- Dusty Grape #545775 ΔE 0.073
- Purple Brown #673A3F ΔE 0.076
- Rebecca Purple #663399 ΔE 0.080
- Light Eggplant #894585 ΔE 0.083
Use #643D6D 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.