#643C59
Closest named color: Purple Brown (#673A3F). oklch(41.4% 0.07 337.7), rgb(100, 60, 89).
Aa
White text reads best on this color (9.00:1).
About this color
#643C59 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.070 and its hue 338°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.042 away. White text reads best on it, at 9.00:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.070) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #643C59 |
| RGB | rgb(100, 60, 89) |
| HSL | hsl(317, 25%, 31%) |
| OKLCH | oklch(41.4% 0.07 337.7) |
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 #643C59 | 9.00:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #643C59 | 2.33:1 | Fails | Lc 13.4 | Not readable |
| #643C59 text on white | 9.00:1 | AAA | Lc 90.5 | Preferred for body text |
| #643C59 text on black | 2.33:1 | 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
#F8F4F7
oklch(97.1% 0.006 334)
-
Step 100
100
#EFE7ED
oklch(93.6% 0.012 334.1)
-
Step 200
200
#E4D4DE
oklch(88.6% 0.022 339.6)
-
Step 300
300
#D3B7CA
oklch(80.9% 0.041 337.7)
-
Step 400
400
#BC91AF
oklch(70.6% 0.066 337.6)
-
Step 500
500
#AB769B
oklch(63.2% 0.083 338.3)
-
Step 600
600
#965E86
oklch(55.7% 0.091 338.1)
-
Step 700
700
#7F4D72
oklch(49% 0.085 337)
-
Step 800
800 (this color)
#643C59
oklch(41.4% 0.07 337.7)
-
Step 900
900
#54364C
oklch(37.6% 0.054 336.9)
-
Step 950
950
#32202C
oklch(27.1% 0.034 339.7)
#643C59 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) | #3D455A | 0.070 |
| Deuteranopia (no green cones) | #474B58 | 0.064 |
| Tritanopia (no blue cones) | #683D47 | 0.032 |
| Achromatopsia (no color) | #494949 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643C59
#643C59
oklch(41.4% 0.07 337.7)
- #26573C
#26573C
oklch(41.4% 0.07 157.2)
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 #643C59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.042
- Brownish Purple #76424E ΔE 0.047
- Dusty Grape #545775 ΔE 0.080
- Dark Mauve #874C62 ΔE 0.084
- Dusk #4E5481 ΔE 0.086
- Charcoal Grey #3C4142 ΔE 0.086
- Velvet #750851 ΔE 0.092
- Grape Purple #5D1451 ΔE 0.092
Use #643C59 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.