#643E57
Closest named color: Purple Brown (#673A3F). oklch(41.7% 0.064 340.6), rgb(100, 62, 87).
Aa
White text reads best on this color (8.86:1).
About this color
#643E57 is a dark, muted purple. In OKLCH its lightness is 42%, its chroma 0.064 and its hue 341°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.038 away. White text reads best on it, at 8.86:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | muted (0.064) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.36:1 |
| White text | 8.86:1 |
Values
| HEX | #643E57 |
| RGB | rgb(100, 62, 87) |
| HSL | hsl(321, 23%, 32%) |
| OKLCH | oklch(41.7% 0.064 340.6) |
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 #643E57 | 8.86:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #643E57 | 2.36:1 | Fails | Lc 13.8 | Not readable |
| #643E57 text on white | 8.86:1 | AAA | Lc 90.2 | Preferred for body text |
| #643E57 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
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#EFE7EC
oklch(93.6% 0.011 339.3)
-
Step 200
200
#E3D4DD
oklch(88.5% 0.02 340.7)
-
Step 300
300
#D2B8C8
oklch(81% 0.037 340.5)
-
Step 400
400
#BB92AC
oklch(70.6% 0.06 340.4)
-
Step 500
500
#AA7798
oklch(63.1% 0.078 340.5)
-
Step 600
600
#945F82
oklch(55.5% 0.084 340.4)
-
Step 700
700
#7E4F6E
oklch(49.1% 0.077 340.5)
-
Step 800
800 (this color)
#643E57
oklch(41.7% 0.064 340.6)
-
Step 900
900
#54374A
oklch(37.8% 0.05 340.3)
-
Step 950
950
#31202B
oklch(26.9% 0.032 340.5)
#643E57 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) | #404658 | 0.065 |
| Deuteranopia (no green cones) | #494C56 | 0.060 |
| Tritanopia (no blue cones) | #683E47 | 0.028 |
| Achromatopsia (no color) | #4A4A4A | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643E57
#643E57
oklch(41.7% 0.064 340.6)
- #295740
#295740
oklch(41.7% 0.064 160)
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 #643E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.038
- Brownish Purple #76424E ΔE 0.042
- Dusty Grape #545775 ΔE 0.076
- Dark Mauve #874C62 ΔE 0.081
- Charcoal Grey #3C4142 ΔE 0.083
- Dusk #4E5481 ΔE 0.085
- Twilight #4E518B ΔE 0.094
- YInMn Blue #415A77 ΔE 0.094
Use #643E57 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.