#643F57
Closest named color: Purple Brown (#673A3F). oklch(41.9% 0.062 340.9), rgb(100, 63, 87).
Aa
White text reads best on this color (8.78:1).
About this color
#643F57 is a dark, muted purple. In OKLCH its lightness is 42%, its chroma 0.062 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 8.78:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | muted (0.062) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.39:1 |
| White text | 8.78:1 |
Values
| HEX | #643F57 |
| RGB | rgb(100, 63, 87) |
| HSL | hsl(321, 23%, 32%) |
| OKLCH | oklch(41.9% 0.062 340.9) |
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 #643F57 | 8.78:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #643F57 | 2.39:1 | Fails | Lc 14.0 | Not readable |
| #643F57 text on white | 8.78:1 | AAA | Lc 90.0 | Fine for body text |
| #643F57 text on black | 2.39:1 | Fails | Lc -12.3 | 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
#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
#BB93AC
oklch(70.8% 0.059 340.8)
-
Step 500
500
#A97897
oklch(63.2% 0.074 341.1)
-
Step 600
600
#946081
oklch(55.6% 0.081 341.6)
-
Step 700
700
#7E4F6D
oklch(49.1% 0.076 341.5)
-
Step 800
800 (this color)
#643F57
oklch(41.9% 0.062 340.9)
-
Step 900
900
#533749
oklch(37.6% 0.048 340.8)
-
Step 950
950
#31202B
oklch(26.9% 0.032 340.5)
#643F57 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) | #414758 | 0.063 |
| Deuteranopia (no green cones) | #4A4D56 | 0.059 |
| Tritanopia (no blue cones) | #683F48 | 0.026 |
| Achromatopsia (no color) | #4B4B4B | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F57
#643F57
oklch(41.9% 0.062 340.9)
- #2A5742
#2A5742
oklch(41.8% 0.062 161.8)
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 #643F57, 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 0.041
- Dusty Grape #545775 ΔE 0.074
- Dark Mauve #874C62 ΔE 0.080
- Charcoal Grey #3C4142 ΔE 0.083
- Dusk #4E5481 ΔE 0.083
- YInMn Blue #415A77 ΔE 0.092
- Twilight #4E518B ΔE 0.093
Use #643F57 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.