#643476
Closest named color: Rebecca Purple (#663399). oklch(41.6% 0.117 316), rgb(100, 52, 118).
Aa
White text reads best on this color (9.15:1).
About this color
#643476 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.117 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 9.15:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #643476 |
| RGB | rgb(100, 52, 118) |
| HSL | hsl(284, 39%, 33%) |
| OKLCH | oklch(41.6% 0.117 316) |
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 #643476 | 9.15:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #643476 | 2.29:1 | Fails | Lc 13.2 | Not readable |
| #643476 text on white | 9.15:1 | AAA | Lc 90.7 | Preferred for body text |
| #643476 text on black | 2.29:1 | Fails | Lc -11.6 | 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
#D2B4DF
oklch(81% 0.068 315.6)
-
Step 400
400
#BB8BCF
oklch(70.7% 0.11 315.7)
-
Step 500
500
#AA6CC2
oklch(63% 0.141 316)
-
Step 600
600
#9552AE
oklch(55.5% 0.153 316.1)
-
Step 700
700
#7F4296
oklch(49.1% 0.142 315.9)
-
Step 800
800 (this color)
#643476
oklch(41.6% 0.117 316)
-
Step 900
900
#543062
oklch(37.6% 0.092 315.9)
-
Step 950
950
#311D39
oklch(27% 0.057 315.8)
#643476 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) | #254578 | 0.105 |
| Deuteranopia (no green cones) | #354974 | 0.092 |
| Tritanopia (no blue cones) | #633E50 | 0.076 |
| Achromatopsia (no color) | #484848 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643476
#643476
oklch(41.6% 0.117 316)
- #2B5909
#2B5909
oklch(41.5% 0.117 135.9)
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 #643476, 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 0.063
- Blueberry #464196 ΔE 0.077
- Twilight #4E518B ΔE 0.082
- Purple #800080 ΔE 0.083
- Grape Purple #5D1451 ΔE 0.085
- Rich Purple #720058 ΔE 0.086
- Dusk #4E5481 ΔE 0.088
Use #643476 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.