#643A57
Closest named color: Purple Brown (#673A3F). oklch(41% 0.072 339.4), rgb(100, 58, 87).
Aa
White text reads best on this color (9.19:1).
About this color
#643A57 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.072 and its hue 339°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.041 away. White text reads best on it, at 9.19:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.072) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #643A57 |
| RGB | rgb(100, 58, 87) |
| HSL | hsl(319, 27%, 31%) |
| OKLCH | oklch(41% 0.072 339.4) |
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 #643A57 | 9.19:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #643A57 | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #643A57 text on white | 9.19:1 | AAA | Lc 91.0 | Preferred for body text |
| #643A57 text on black | 2.28:1 | Fails | Lc -11.3 | 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
#F8F4F7
oklch(97.1% 0.006 334)
-
Step 100
100
#F0E7EC
oklch(93.6% 0.012 342.6)
-
Step 200
200
#E4D3DE
oklch(88.4% 0.024 338.7)
-
Step 300
300
#D4B7CA
oklch(81% 0.042 338.8)
-
Step 400
400
#BE90AE
oklch(70.6% 0.068 339.8)
-
Step 500
500
#AD759A
oklch(63.2% 0.086 340.1)
-
Step 600
600
#985D85
oklch(55.7% 0.094 339.9)
-
Step 700
700
#814C71
oklch(49.1% 0.088 339.1)
-
Step 800
800 (this color)
#643A57
oklch(41% 0.072 339.4)
-
Step 900
900
#56354B
oklch(37.7% 0.058 340.1)
-
Step 950
950
#321F2C
oklch(26.9% 0.037 339)
#643A57 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) | #3B4458 | 0.075 |
| Deuteranopia (no green cones) | #464A56 | 0.068 |
| Tritanopia (no blue cones) | #683B45 | 0.032 |
| Achromatopsia (no color) | #484848 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643A57
#643A57
oklch(41% 0.072 339.4)
- #21563C
#21563C
oklch(40.9% 0.072 159.3)
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 #643A57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.041
- Brownish Purple #76424E ΔE 0.049
- Dusty Grape #545775 ΔE 0.085
- Charcoal Grey #3C4142 ΔE 0.086
- Dark Mauve #874C62 ΔE 0.087
- Velvet #750851 ΔE 0.088
- Grape Purple #5D1451 ΔE 0.088
- Dusk #4E5481 ΔE 0.091
Use #643A57 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.