#643663
Closest named color: Purple Brown (#673A3F). oklch(40.8% 0.092 327.9), rgb(100, 54, 99).
Aa
White text reads best on this color (9.33:1).
About this color
#643663 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.092 and its hue 328°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.066 away. White text reads best on it, at 9.33:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #643663 |
| RGB | rgb(100, 54, 99) |
| HSL | hsl(301, 30%, 30%) |
| OKLCH | oklch(40.8% 0.092 327.9) |
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 #643663 | 9.33:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #643663 | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #643663 text on white | 9.33:1 | AAA | Lc 91.3 | Preferred for body text |
| #643663 text on black | 2.24:1 | Fails | Lc -11.0 | 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
#F0E6EF
oklch(93.5% 0.016 328.8)
-
Step 200
200
#E5D3E3
oklch(88.6% 0.029 329.3)
-
Step 300
300
#D4B5D3
oklch(80.9% 0.054 327.1)
-
Step 400
400
#BE8EBC
oklch(70.8% 0.085 327.8)
-
Step 500
500
#AD71AB
oklch(63.2% 0.109 327.9)
-
Step 600
600
#985897
oklch(55.6% 0.12 327.6)
-
Step 700
700
#824880
oklch(49.2% 0.11 328.3)
-
Step 800
800 (this color)
#643663
oklch(40.8% 0.092 327.9)
-
Step 900
900
#563355
oklch(37.7% 0.072 327.9)
-
Step 950
950
#321E32
oklch(26.9% 0.046 326.8)
#643663 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) | #334365 | 0.088 |
| Deuteranopia (no green cones) | #3F4962 | 0.080 |
| Tritanopia (no blue cones) | #673A48 | 0.051 |
| Achromatopsia (no color) | #474747 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643663
#643663
oklch(40.8% 0.092 327.9)
- #20572B
#20572B
oklch(40.8% 0.092 147.7)
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 #643663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.066
- Brownish Purple #76424E ΔE 0.068
- Grape Purple #5D1451 ΔE 0.077
- Velvet #750851 ΔE 0.078
- Rich Purple #720058 ΔE 0.083
- Dark Slate Blue #483D8B ΔE 0.084
- Dusk #4E5481 ΔE 0.090
- Red Purple #820747 ΔE 0.090
Use #643663 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.