#643F5A
Closest named color: Purple Brown (#673A3F). oklch(42% 0.065 337.2), rgb(100, 63, 90).
Aa
White text reads best on this color (8.74:1).
About this color
#643F5A is a dark, muted purple. In OKLCH its lightness is 42%, its chroma 0.065 and its hue 337°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.043 away. White text reads best on it, at 8.74:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.40:1 |
| White text | 8.74:1 |
Values
| HEX | #643F5A |
| RGB | rgb(100, 63, 90) |
| HSL | hsl(316, 23%, 32%) |
| OKLCH | oklch(42% 0.065 337.2) |
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 #643F5A | 8.74:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #643F5A | 2.40:1 | Fails | Lc 14.1 | Not readable |
| #643F5A text on white | 8.74:1 | AAA | Lc 89.8 | Fine for body text |
| #643F5A text on black | 2.40:1 | Fails | Lc -12.4 | 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
#EFE7EC
oklch(93.6% 0.011 339.3)
-
Step 200
200
#E3D4DE
oklch(88.5% 0.021 337.7)
-
Step 300
300
#D2B8CA
oklch(81% 0.038 337.1)
-
Step 400
400
#BA92AE
oklch(70.6% 0.061 337.4)
-
Step 500
500
#A8779B
oklch(63% 0.078 336.5)
-
Step 600
600
#936085
oklch(55.6% 0.084 337.3)
-
Step 700
700
#7D4F71
oklch(49.1% 0.078 336.9)
-
Step 800
800 (this color)
#643F5A
oklch(42% 0.065 337.2)
-
Step 900
900
#53374B
oklch(37.7% 0.05 337.6)
-
Step 950
950
#31202C
oklch(26.9% 0.033 337.8)
#643F5A 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) | #40475B | 0.064 |
| Deuteranopia (no green cones) | #494D59 | 0.060 |
| Tritanopia (no blue cones) | #684049 | 0.031 |
| Achromatopsia (no color) | #4B4B4B | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F5A
#643F5A
oklch(42% 0.065 337.2)
- #2C583F
#2C583F
oklch(42.1% 0.065 157.2)
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 #643F5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.043
- Brownish Purple #76424E ΔE 0.043
- Dusty Grape #545775 ΔE 0.073
- Dark Mauve #874C62 ΔE 0.079
- Dusk #4E5481 ΔE 0.080
- Charcoal Grey #3C4142 ΔE 0.085
- Twilight #4E518B ΔE 0.089
- YInMn Blue #415A77 ΔE 0.091
Use #643F5A 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.