#643D55
Closest named color: Purple Brown (#673A3F). oklch(41.5% 0.065 342.7), rgb(100, 61, 85).
Aa
White text reads best on this color (8.97:1).
About this color
#643D55 is a dark, muted purple. In OKLCH its lightness is 41%, its chroma 0.065 and its hue 343°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.035 away. White text reads best on it, at 8.97:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.34:1 |
| White text | 8.97:1 |
Values
| HEX | #643D55 |
| RGB | rgb(100, 61, 85) |
| HSL | hsl(323, 24%, 32%) |
| OKLCH | oklch(41.5% 0.065 342.7) |
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 #643D55 | 8.97:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #643D55 | 2.34:1 | Fails | Lc 13.5 | Not readable |
| #643D55 text on white | 8.97:1 | AAA | Lc 90.5 | Preferred for body text |
| #643D55 text on black | 2.34:1 | Fails | Lc -11.8 | 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
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#EFE7EC
oklch(93.6% 0.011 339.3)
-
Step 200
200
#E4D4DD
oklch(88.5% 0.021 342.6)
-
Step 300
300
#D3B7C7
oklch(80.8% 0.038 342.7)
-
Step 400
400
#BC92AB
oklch(70.7% 0.061 342.3)
-
Step 500
500
#AB7796
oklch(63.2% 0.077 343)
-
Step 600
600
#965F80
oklch(55.6% 0.084 343.4)
-
Step 700
700
#7F4E6D
oklch(49% 0.079 341.9)
-
Step 800
800 (this color)
#643D55
oklch(41.5% 0.065 342.7)
-
Step 900
900
#543749
oklch(37.7% 0.05 342)
-
Step 950
950
#32202B
oklch(27% 0.033 342.3)
#643D55 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) | #3F4556 | 0.067 |
| Deuteranopia (no green cones) | #494C54 | 0.062 |
| Tritanopia (no blue cones) | #693D46 | 0.027 |
| Achromatopsia (no color) | #494949 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643D55
#643D55
oklch(41.5% 0.065 342.7)
- #265741
#265741
oklch(41.6% 0.065 162.2)
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 #643D55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.035
- Brownish Purple #76424E ΔE 0.042
- Dusty Grape #545775 ΔE 0.080
- Charcoal Grey #3C4142 ΔE 0.082
- Dark Mauve #874C62 ΔE 0.083
- Dusk #4E5481 ΔE 0.088
- Dark Grey Blue #29465B ΔE 0.096
- Velvet #750851 ΔE 0.096
Use #643D55 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.