#643C55
Closest named color: Purple Brown (#673A3F). oklch(41.3% 0.067 342.4), rgb(100, 60, 85).
Aa
White text reads best on this color (9.05:1).
About this color
#643C55 is a dark, muted purple. In OKLCH its lightness is 41%, its chroma 0.067 and its hue 342°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.036 away. White text reads best on it, at 9.05:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | muted (0.067) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.31:1 |
| White text | 9.05:1 |
Values
| HEX | #643C55 |
| RGB | rgb(100, 60, 85) |
| HSL | hsl(323, 25%, 31%) |
| OKLCH | oklch(41.3% 0.067 342.4) |
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 #643C55 | 9.05:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #643C55 | 2.31:1 | Fails | Lc 13.3 | Not readable |
| #643C55 text on white | 9.05:1 | AAA | Lc 90.7 | Preferred for body text |
| #643C55 text on black | 2.31:1 | Fails | Lc -11.6 | 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
#F0E7EC
oklch(93.6% 0.012 342.6)
-
Step 200
200
#E4D4DD
oklch(88.5% 0.021 342.6)
-
Step 300
300
#D3B7C8
oklch(80.8% 0.039 341)
-
Step 400
400
#BD92AB
oklch(70.8% 0.062 343)
-
Step 500
500
#AB7697
oklch(63% 0.08 341.8)
-
Step 600
600
#965E81
oklch(55.5% 0.087 342.3)
-
Step 700
700
#804E6D
oklch(49.1% 0.08 342.6)
-
Step 800
800 (this color)
#643C55
oklch(41.3% 0.067 342.4)
-
Step 900
900
#553649
oklch(37.6% 0.053 342.5)
-
Step 950
950
#32202B
oklch(27% 0.033 342.3)
#643C55 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) | #3E4556 | 0.069 |
| Deuteranopia (no green cones) | #484B54 | 0.063 |
| Tritanopia (no blue cones) | #693C45 | 0.028 |
| Achromatopsia (no color) | #494949 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643C55
#643C55
oklch(41.3% 0.067 342.4)
- #245640
#245640
oklch(41.2% 0.066 162.4)
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 #643C55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.036
- Brownish Purple #76424E ΔE 0.044
- Dusty Grape #545775 ΔE 0.082
- Charcoal Grey #3C4142 ΔE 0.083
- Dark Mauve #874C62 ΔE 0.084
- Dusk #4E5481 ΔE 0.090
- Velvet #750851 ΔE 0.093
- Grape Purple #5D1451 ΔE 0.094
Use #643C55 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.