#643F6B
Closest named color: Brownish Purple (#76424E). oklch(42.8% 0.084 321.1), rgb(100, 63, 107).
Aa
White text reads best on this color (8.51:1).
About this color
#643F6B is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.084 and its hue 321°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.063 away. White text reads best on it, at 8.51:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.084) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.46:1 |
| White text | 8.51:1 |
Values
| HEX | #643F6B |
| RGB | rgb(100, 63, 107) |
| HSL | hsl(290, 26%, 33%) |
| OKLCH | oklch(42.8% 0.084 321.1) |
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 #643F6B | 8.51:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #643F6B | 2.46:1 | Fails | Lc 14.8 | Not readable |
| #643F6B text on white | 8.51:1 | AAA | Lc 89.2 | Fine for body text |
| #643F6B text on black | 2.46:1 | 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
#E2D4E4
oklch(88.6% 0.026 321.9)
-
Step 300
300
#D0B7D4
oklch(81% 0.049 321.6)
-
Step 400
400
#B791BE
oklch(70.7% 0.077 321.1)
-
Step 500
500
#A575AE
oklch(63.1% 0.099 321.1)
-
Step 600
600
#905D9A
oklch(55.7% 0.108 320.9)
-
Step 700
700
#7A4C83
oklch(49% 0.101 320.9)
-
Step 800
800 (this color)
#643F6B
oklch(42.8% 0.084 321.1)
-
Step 900
900
#513657
oklch(37.8% 0.065 320.2)
-
Step 950
950
#302033
oklch(27.2% 0.041 321.1)
#643F6B 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) | #394A6D | 0.074 |
| Deuteranopia (no green cones) | #434E6A | 0.067 |
| Tritanopia (no blue cones) | #654450 | 0.052 |
| Achromatopsia (no color) | #4D4D4D | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F6B
#643F6B
oklch(42.8% 0.084 321.1)
- #345A2E
#345A2E
oklch(42.7% 0.082 141)
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 #643F6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.063
- Dusk #4E5481 ΔE 0.068
- Dusty Grape #545775 ΔE 0.068
- Twilight #4E518B ΔE 0.071
- Purple Brown #673A3F ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.075
- Dark Mauve #874C62 ΔE 0.083
- Light Eggplant #894585 ΔE 0.083
Use #643F6B 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.