#643376
Closest named color: Rebecca Purple (#663399). oklch(41.4% 0.119 316.2), rgb(100, 51, 118).
Aa
White text reads best on this color (9.22:1).
About this color
#643376 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.119 and its hue 316°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.058 away. White text reads best on it, at 9.22:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.119) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.27:1 |
| White text | 9.22:1 |
Values
| HEX | #643376 |
| RGB | rgb(100, 51, 118) |
| HSL | hsl(284, 40%, 33%) |
| OKLCH | oklch(41.4% 0.119 316.2) |
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 #643376 | 9.22:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #643376 | 2.27:1 | Fails | Lc 13.1 | Not readable |
| #643376 text on white | 9.22:1 | AAA | Lc 90.9 | Preferred for body text |
| #643376 text on black | 2.27:1 | Fails | Lc -11.4 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EFE6F3
oklch(93.6% 0.02 315.7)
-
Step 200
200
#E3D2EB
oklch(88.5% 0.038 315.1)
-
Step 300
300
#D3B3DF
oklch(80.9% 0.07 316.8)
-
Step 400
400
#BC8BCF
oklch(70.8% 0.11 316.3)
-
Step 500
500
#AB6CC3
oklch(63.2% 0.142 316.2)
-
Step 600
600
#9652AF
oklch(55.7% 0.154 316.2)
-
Step 700
700
#804296
oklch(49.2% 0.143 316.5)
-
Step 800
800 (this color)
#643376
oklch(41.4% 0.119 316.2)
-
Step 900
900
#543062
oklch(37.6% 0.092 315.9)
-
Step 950
950
#321D3A
oklch(27.2% 0.059 316.2)
#643376 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) | #234478 | 0.107 |
| Deuteranopia (no green cones) | #344974 | 0.095 |
| Tritanopia (no blue cones) | #633E4F | 0.079 |
| Achromatopsia (no color) | #474747 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643376
#643376
oklch(41.4% 0.119 316.2)
- #295906
#295906
oklch(41.4% 0.119 136.3)
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 #643376, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.064
- Blueberry #464196 ΔE 0.078
- Purple #800080 ΔE 0.081
- Grape Purple #5D1451 ΔE 0.084
- Twilight #4E518B ΔE 0.084
- Rich Purple #720058 ΔE 0.085
- Velvet #750851 ΔE 0.087
Use #643376 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.