#643658
Closest named color: Purple Brown (#673A3F). oklch(40.3% 0.081 337.5), rgb(100, 54, 88).
Aa
White text reads best on this color (9.50:1).
About this color
#643658 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.081 and its hue 338°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.047 away. White text reads best on it, at 9.50:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.21:1 |
| White text | 9.50:1 |
Values
| HEX | #643658 |
| RGB | rgb(100, 54, 88) |
| HSL | hsl(316, 30%, 30%) |
| OKLCH | oklch(40.3% 0.081 337.5) |
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 #643658 | 9.50:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #643658 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #643658 text on white | 9.50:1 | AAA | Lc 91.8 | Preferred for body text |
| #643658 text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F8F4F7
oklch(97.1% 0.006 334)
-
Step 100
100
#F0E6ED
oklch(93.5% 0.014 336.2)
-
Step 200
200
#E5D3DF
oklch(88.5% 0.025 337.8)
-
Step 300
300
#D6B5CC
oklch(80.9% 0.049 337.1)
-
Step 400
400
#C08FB2
oklch(70.8% 0.075 337.1)
-
Step 500
500
#AF729E
oklch(63% 0.097 337.6)
-
Step 600
600
#9A5A89
oklch(55.6% 0.104 337.5)
-
Step 700
700
#844974
oklch(49.1% 0.099 338)
-
Step 800
800 (this color)
#643658
oklch(40.3% 0.081 337.5)
-
Step 900
900
#57344E
oklch(37.7% 0.064 336.8)
-
Step 950
950
#331F2D
oklch(27% 0.039 338.4)
#643658 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) | #374159 | 0.083 |
| Deuteranopia (no green cones) | #434857 | 0.075 |
| Tritanopia (no blue cones) | #683743 | 0.038 |
| Achromatopsia (no color) | #464646 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643658
#643658
oklch(40.3% 0.081 337.5)
- #185537
#185537
oklch(40.2% 0.08 157.9)
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 #643658, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.047
- Brownish Purple #76424E ΔE 0.057
- Grape Purple #5D1451 ΔE 0.077
- Velvet #750851 ΔE 0.078
- Rich Purple #720058 ΔE 0.086
- Red Purple #820747 ΔE 0.086
- Merlot #730039 ΔE 0.089
- Wine #80013F ΔE 0.089
Use #643658 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.