#643B67
Closest named color: Brownish Purple (#76424E). oklch(41.9% 0.087 324.5), rgb(100, 59, 103).
Aa
White text reads best on this color (8.88:1).
About this color
#643B67 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.087 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 0.063 away. White text reads best on it, at 8.88:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.087) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.36:1 |
| White text | 8.88:1 |
Values
| HEX | #643B67 |
| RGB | rgb(100, 59, 103) |
| HSL | hsl(296, 27%, 32%) |
| OKLCH | oklch(41.9% 0.087 324.5) |
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 #643B67 | 8.88:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #643B67 | 2.36:1 | Fails | Lc 13.8 | Not readable |
| #643B67 text on white | 8.88:1 | AAA | Lc 90.2 | Preferred for body text |
| #643B67 text on black | 2.36:1 | Fails | Lc -12.1 | 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
#E3D3E4
oklch(88.5% 0.029 324)
-
Step 300
300
#D2B6D3
oklch(80.9% 0.051 325)
-
Step 400
400
#BA8FBD
oklch(70.6% 0.082 324.3)
-
Step 500
500
#A973AC
oklch(63.1% 0.103 324.9)
-
Step 600
600
#945B98
oklch(55.7% 0.112 324.6)
-
Step 700
700
#7E4A82
oklch(49.1% 0.106 324.4)
-
Step 800
800 (this color)
#643B67
oklch(41.9% 0.087 324.5)
-
Step 900
900
#533456
oklch(37.6% 0.069 323.7)
-
Step 950
950
#311F32
oklch(27% 0.043 324.9)
#643B67 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) | #374769 | 0.080 |
| Deuteranopia (no green cones) | #414C66 | 0.074 |
| Tritanopia (no blue cones) | #66404C | 0.052 |
| Achromatopsia (no color) | #4A4A4A | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643B67
#643B67
oklch(41.9% 0.087 324.5)
- #2B592D
#2B592D
oklch(41.9% 0.087 144.7)
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 #643B67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.063
- Purple Brown #673A3F ΔE 0.067
- Dusk #4E5481 ΔE 0.078
- Dusty Grape #545775 ΔE 0.078
- Dark Slate Blue #483D8B ΔE 0.079
- Twilight #4E518B ΔE 0.080
- Rebecca Purple #663399 ΔE 0.088
- Dark Mauve #874C62 ΔE 0.088
Use #643B67 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.