#643772
Closest named color: Dark Slate Blue (#483D8B). oklch(41.8% 0.107 317.7), rgb(100, 55, 114).
Aa
White text reads best on this color (9.00:1).
About this color
#643772 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.107 and its hue 318°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.066 away. White text reads best on it, at 9.00:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #643772 |
| RGB | rgb(100, 55, 114) |
| HSL | hsl(286, 35%, 33%) |
| OKLCH | oklch(41.8% 0.107 317.7) |
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 #643772 | 9.00:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #643772 | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #643772 text on white | 9.00:1 | AAA | Lc 90.4 | Preferred for body text |
| #643772 text on black | 2.33:1 | Fails | Lc -11.9 | 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
#F8F4F9
oklch(97.2% 0.008 319.4)
-
Step 100
100
#EFE6F2
oklch(93.5% 0.019 317.7)
-
Step 200
200
#E3D2E8
oklch(88.4% 0.035 318.5)
-
Step 300
300
#D2B4DB
oklch(80.8% 0.063 318.3)
-
Step 400
400
#BB8DC9
oklch(70.8% 0.099 318.2)
-
Step 500
500
#A96FBC
oklch(63.1% 0.128 317.5)
-
Step 600
600
#9456A8
oklch(55.7% 0.139 317.5)
-
Step 700
700
#7E4590
oklch(49% 0.13 317.6)
-
Step 800
800 (this color)
#643772
oklch(41.8% 0.107 317.7)
-
Step 900
900
#54325E
oklch(37.8% 0.083 318.3)
-
Step 950
950
#311E37
oklch(27.1% 0.052 317.8)
#643772 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) | #2C4674 | 0.095 |
| Deuteranopia (no green cones) | #394A70 | 0.085 |
| Tritanopia (no blue cones) | #643F4F | 0.069 |
| Achromatopsia (no color) | #494949 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643772
#643772
oklch(41.8% 0.107 317.7)
- #2C5919
#2C5919
oklch(41.7% 0.106 137.8)
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 #643772, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.066
- Rebecca Purple #663399 ΔE 0.066
- Twilight #4E518B ΔE 0.079
- Blueberry #464196 ΔE 0.080
- Dusk #4E5481 ΔE 0.082
- Brownish Purple #76424E ΔE 0.084
- Light Eggplant #894585 ΔE 0.086
- Grape Purple #5D1451 ΔE 0.087
Use #643772 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.