#643286
Closest named color: Rebecca Purple (#663399). oklch(42.3% 0.139 309.1), rgb(100, 50, 134).
Aa
White text reads best on this color (8.96:1).
About this color
#643286 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.139 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.031 away. White text reads best on it, at 8.96:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.34:1 |
| White text | 8.96:1 |
Values
| HEX | #643286 |
| RGB | rgb(100, 50, 134) |
| HSL | hsl(276, 46%, 36%) |
| OKLCH | oklch(42.3% 0.139 309.1) |
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 #643286 | 8.96:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #643286 | 2.34:1 | Fails | Lc 13.9 | Not readable |
| #643286 text on white | 8.96:1 | AAA | Lc 90.1 | Preferred for body text |
| #643286 text on black | 2.34:1 | Fails | Lc -12.2 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E2D2F0
oklch(88.6% 0.044 309.3)
-
Step 300
300
#D0B3E9
oklch(81% 0.081 309)
-
Step 400
400
#B889DE
oklch(70.7% 0.13 308.8)
-
Step 500
500
#A768D4
oklch(63% 0.167 309.3)
-
Step 600
600
#924DC1
oklch(55.6% 0.18 309.1)
-
Step 700
700
#7C3DA7
oklch(49% 0.168 308.9)
-
Step 800
800 (this color)
#643286
oklch(42.3% 0.139 309.1)
-
Step 900
900
#522E6C
oklch(37.6% 0.108 308.9)
-
Step 950
950
#301C3F
oklch(27% 0.067 309)
#643286 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) | #0D4789 | 0.121 |
| Deuteranopia (no green cones) | #274A84 | 0.107 |
| Tritanopia (no blue cones) | #5F4257 | 0.097 |
| Achromatopsia (no color) | #494949 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643286
#643286
oklch(42.3% 0.139 309.1)
- #3A5900
#3A5900
oklch(42.3% 0.113 129.1)
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 #643286, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.055
- Blueberry #464196 ΔE 0.065
- Purple #800080 ΔE 0.077
- Twilight #4E518B ΔE 0.082
- Light Eggplant #894585 ΔE 0.090
- Dark Magenta #8B008B ΔE 0.090
- Chrysanthemum #560BAD ΔE 0.091
Use #643286 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.