#643758
Closest named color: Purple Brown (#673A3F). oklch(40.5% 0.079 337.7), rgb(100, 55, 88).
Aa
White text reads best on this color (9.42:1).
About this color
#643758 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.079 and its hue 338°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.046 away. White text reads best on it, at 9.42:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.079) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.22:1 |
| White text | 9.42:1 |
Values
| HEX | #643758 |
| RGB | rgb(100, 55, 88) |
| HSL | hsl(316, 29%, 30%) |
| OKLCH | oklch(40.5% 0.079 337.7) |
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 #643758 | 9.42:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #643758 | 2.22:1 | Fails | Lc 12.4 | Not readable |
| #643758 text on white | 9.42:1 | AAA | Lc 91.6 | Preferred for body text |
| #643758 text on black | 2.22:1 | Fails | Lc -10.8 | 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
#F0E7ED
oklch(93.7% 0.013 337.5)
-
Step 200
200
#E5D3DF
oklch(88.5% 0.025 337.8)
-
Step 300
300
#D5B6CB
oklch(80.9% 0.045 337.9)
-
Step 400
400
#C08FB1
oklch(70.7% 0.075 338)
-
Step 500
500
#AF739E
oklch(63.2% 0.095 337.7)
-
Step 600
600
#9A5A89
oklch(55.6% 0.104 337.5)
-
Step 700
700
#834A74
oklch(49.1% 0.096 337.5)
-
Step 800
800 (this color)
#643758
oklch(40.5% 0.079 337.7)
-
Step 900
900
#57344D
oklch(37.7% 0.063 338.1)
-
Step 950
950
#331F2D
oklch(27% 0.039 338.4)
#643758 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) | #384259 | 0.081 |
| Deuteranopia (no green cones) | #444957 | 0.074 |
| Tritanopia (no blue cones) | #683843 | 0.038 |
| Achromatopsia (no color) | #464646 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643758
#643758
oklch(40.5% 0.079 337.7)
- #1A5638
#1A5638
oklch(40.6% 0.08 157.7)
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 #643758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.046
- Brownish Purple #76424E ΔE 0.055
- Grape Purple #5D1451 ΔE 0.079
- Velvet #750851 ΔE 0.080
- Red Purple #820747 ΔE 0.087
- Rich Purple #720058 ΔE 0.088
- Charcoal Grey #3C4142 ΔE 0.090
- Merlot #730039 ΔE 0.091
Use #643758 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.