#643F68
Closest named color: Brownish Purple (#76424E). oklch(42.7% 0.08 323.4), rgb(100, 63, 104).
Aa
White text reads best on this color (8.56:1).
About this color
#643F68 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.080 and its hue 323°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.059 away. White text reads best on it, at 8.56:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.45:1 |
| White text | 8.56:1 |
Values
| HEX | #643F68 |
| RGB | rgb(100, 63, 104) |
| HSL | hsl(294, 25%, 33%) |
| OKLCH | oklch(42.7% 0.08 323.4) |
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 #643F68 | 8.56:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #643F68 | 2.45:1 | Fails | Lc 14.7 | Not readable |
| #643F68 text on white | 8.56:1 | AAA | Lc 89.3 | Fine for body text |
| #643F68 text on black | 2.45:1 | Fails | Lc -12.9 | 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
#EEE7EF
oklch(93.6% 0.013 321.9)
-
Step 200
200
#E2D4E3
oklch(88.6% 0.025 323.8)
-
Step 300
300
#D0B7D2
oklch(80.9% 0.046 323.7)
-
Step 400
400
#B891BC
oklch(70.7% 0.075 323.3)
-
Step 500
500
#A675AB
oklch(63.1% 0.097 323.5)
-
Step 600
600
#915D96
oklch(55.6% 0.105 323.7)
-
Step 700
700
#7B4D80
oklch(49.2% 0.096 323.4)
-
Step 800
800 (this color)
#643F68
oklch(42.7% 0.08 323.4)
-
Step 900
900
#523655
oklch(37.8% 0.063 323.3)
-
Step 950
950
#302032
oklch(27.1% 0.04 322.8)
#643F68 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) | #3B496A | 0.071 |
| Deuteranopia (no green cones) | #444E67 | 0.066 |
| Tritanopia (no blue cones) | #65434E | 0.049 |
| Achromatopsia (no color) | #4C4C4C | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F68
#643F68
oklch(42.7% 0.08 323.4)
- #325A31
#325A31
oklch(42.7% 0.08 143.5)
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 #643F68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.059
- Purple Brown #673A3F ΔE 0.066
- Dusty Grape #545775 ΔE 0.068
- Dusk #4E5481 ΔE 0.069
- Twilight #4E518B ΔE 0.074
- Dark Slate Blue #483D8B ΔE 0.079
- Dark Mauve #874C62 ΔE 0.081
- Light Eggplant #894585 ΔE 0.086
Use #643F68 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.