#643996
Closest named color: Rebecca Purple (#663399). oklch(44.4% 0.148 302), rgb(100, 57, 150).
Aa
White text reads best on this color (8.17:1).
About this color
#643996 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.148 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.014 away. White text reads best on it, at 8.17:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #643996 |
| RGB | rgb(100, 57, 150) |
| HSL | hsl(268, 45%, 41%) |
| OKLCH | oklch(44.4% 0.148 302) |
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 #643996 | 8.17:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #643996 | 2.56:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #643996 text on white | 8.17:1 | AAA | Lc 87.9 | Fine for body text |
| #643996 text on black | 2.56:1 | Fails | Lc -14.3 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F8
oklch(93.6% 0.025 303.5)
-
Step 200
200
#DFD2F4
oklch(88.5% 0.048 302.8)
-
Step 300
300
#CBB4F0
oklch(81% 0.087 302)
-
Step 400
400
#B18AE8
oklch(70.7% 0.139 302.1)
-
Step 500
500
#9E6AE1
oklch(63.1% 0.176 301.7)
-
Step 600
600
#8A4ECE
oklch(55.7% 0.191 302.1)
-
Step 700
700
#753EB2
oklch(49.1% 0.177 302)
-
Step 800
800 (this color)
#643996
oklch(44.4% 0.148 302)
-
Step 900
900
#4E2F73
oklch(37.8% 0.114 302.3)
-
Step 950
950
#2D1C44
oklch(27% 0.073 301.3)
#643996 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) | #004E99 | 0.117 |
| Deuteranopia (no green cones) | #1D4F94 | 0.106 |
| Tritanopia (no blue cones) | #5A4C62 | 0.109 |
| Achromatopsia (no color) | #4F4F4F | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643996
#643996
oklch(44.4% 0.148 302)
- #4A5C00
#4A5C00
oklch(44.4% 0.107 121.9)
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 #643996, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.014
- Dark Slate Blue #483D8B ΔE 0.053
- Blueberry #464196 ΔE 0.054
- Twilight #4E518B ΔE 0.072
- Bluey Purple #6241C7 ΔE 0.080
- Grape #7209B7 ΔE 0.081
- Chrysanthemum #560BAD ΔE 0.083
- Blue With A Hint Of Purple #533CC6 ΔE 0.084
Use #643996 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.