#643F65
Closest named color: Brownish Purple (#76424E). oklch(42.5% 0.077 325.9), rgb(100, 63, 101).
Aa
White text reads best on this color (8.60:1).
About this color
#643F65 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.077 and its hue 326°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.055 away. White text reads best on it, at 8.60:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.077) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.44:1 |
| White text | 8.60:1 |
Values
| HEX | #643F65 |
| RGB | rgb(100, 63, 101) |
| HSL | hsl(298, 23%, 32%) |
| OKLCH | oklch(42.5% 0.077 325.9) |
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 #643F65 | 8.60:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #643F65 | 2.44:1 | Fails | Lc 14.6 | Not readable |
| #643F65 text on white | 8.60:1 | AAA | Lc 89.4 | Fine for body text |
| #643F65 text on black | 2.44:1 | 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
#EFE7EF
oklch(93.7% 0.014 325.7)
-
Step 200
200
#E2D4E2
oklch(88.5% 0.024 325.8)
-
Step 300
300
#D0B7D0
oklch(80.8% 0.044 326)
-
Step 400
400
#B891B9
oklch(70.6% 0.072 325.5)
-
Step 500
500
#A676A7
oklch(63.1% 0.091 325.9)
-
Step 600
600
#915E93
oklch(55.6% 0.099 325.5)
-
Step 700
700
#7B4D7D
oklch(49% 0.093 325.4)
-
Step 800
800 (this color)
#643F65
oklch(42.5% 0.077 325.9)
-
Step 900
900
#523653
oklch(37.7% 0.06 325.5)
-
Step 950
950
#302030
oklch(27% 0.037 326.5)
#643F65 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) | #3C4966 | 0.071 |
| Deuteranopia (no green cones) | #454E64 | 0.065 |
| Tritanopia (no blue cones) | #66434D | 0.046 |
| Achromatopsia (no color) | #4C4C4C | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F65
#643F65
oklch(42.5% 0.077 325.9)
- #315A34
#315A34
oklch(42.7% 0.077 145.7)
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 #643F65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.055
- Purple Brown #673A3F ΔE 0.061
- Dusty Grape #545775 ΔE 0.069
- Dusk #4E5481 ΔE 0.071
- Twilight #4E518B ΔE 0.077
- Dark Mauve #874C62 ΔE 0.080
- Dark Slate Blue #483D8B ΔE 0.083
- YInMn Blue #415A77 ΔE 0.088
Use #643F65 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.