#643F6D
Closest named color: Brownish Purple (#76424E). oklch(42.9% 0.086 319.6), rgb(100, 63, 109).
Aa
White text reads best on this color (8.48:1).
About this color
#643F6D is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.086 and its hue 320°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.065 away. White text reads best on it, at 8.48:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.086) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.47:1 |
| White text | 8.48:1 |
Values
| HEX | #643F6D |
| RGB | rgb(100, 63, 109) |
| HSL | hsl(288, 27%, 34%) |
| OKLCH | oklch(42.9% 0.086 319.6) |
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 #643F6D | 8.48:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #643F6D | 2.47:1 | Fails | Lc 14.9 | Not readable |
| #643F6D text on white | 8.48:1 | AAA | Lc 89.1 | Fine for body text |
| #643F6D text on black | 2.47:1 | Fails | Lc -13.1 | 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
#F7F4F8
oklch(97.1% 0.006 317.8)
-
Step 100
100
#EEE7F0
oklch(93.6% 0.014 318.7)
-
Step 200
200
#E2D4E5
oklch(88.6% 0.027 320.3)
-
Step 300
300
#CFB7D5
oklch(80.9% 0.049 319.5)
-
Step 400
400
#B791C0
oklch(70.8% 0.079 319.8)
-
Step 500
500
#A575B0
oklch(63.2% 0.102 320)
-
Step 600
600
#905C9C
oklch(55.6% 0.112 319.9)
-
Step 700
700
#7A4C85
oklch(49.1% 0.103 319.7)
-
Step 800
800 (this color)
#643F6D
oklch(42.9% 0.086 319.6)
-
Step 900
900
#513558
oklch(37.6% 0.068 319.4)
-
Step 950
950
#301F33
oklch(26.9% 0.043 321.4)
#643F6D 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) | #394A6F | 0.074 |
| Deuteranopia (no green cones) | #424E6C | 0.068 |
| Tritanopia (no blue cones) | #654551 | 0.055 |
| Achromatopsia (no color) | #4D4D4D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F6D
#643F6D
oklch(42.9% 0.086 319.6)
- #355B2B
#355B2B
oklch(43% 0.087 139.4)
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 #643F6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.065
- Dusk #4E5481 ΔE 0.067
- Dusty Grape #545775 ΔE 0.068
- Twilight #4E518B ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.073
- Purple Brown #673A3F ΔE 0.074
- Light Eggplant #894585 ΔE 0.082
- Rebecca Purple #663399 ΔE 0.082
Use #643F6D 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.