#643DAC
Closest named color: Rebecca Purple (#663399). oklch(46.7% 0.169 295.2), rgb(100, 61, 172).
Aa
White text reads best on this color (7.48:1).
About this color
#643DAC is a medium-dark, vivid purple. In OKLCH its lightness is 47%, its chroma 0.169 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.036 away. White text reads best on it, at 7.48:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.169) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.80:1 |
| White text | 7.48:1 |
Values
| HEX | #643DAC |
| RGB | rgb(100, 61, 172) |
| HSL | hsl(261, 48%, 46%) |
| OKLCH | oklch(46.7% 0.169 295.2) |
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 #643DAC | 7.48:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #643DAC | 2.80:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #643DAC text on white | 7.48:1 | AAA | Lc 85.5 | Fine for body text |
| #643DAC text on black | 2.80:1 | Fails | Lc -16.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F8
oklch(93.6% 0.023 296.7)
-
Step 200
200
#DBD4F5
oklch(88.6% 0.046 295.2)
-
Step 300
300
#C4B7F0
oklch(81% 0.081 295)
-
Step 400
400
#A78FE9
oklch(70.7% 0.13 295.1)
-
Step 500
500
#9370E2
oklch(63.1% 0.167 295.4)
-
Step 600
600
#7E55D0
oklch(55.6% 0.182 295.2)
-
Step 700
700 (this color)
#643DAC
oklch(46.7% 0.169 295.2)
-
Step 800
800
#573992
oklch(42.7% 0.141 295.4)
-
Step 900
900
#473274
oklch(37.6% 0.109 295.3)
-
Step 950
950
#291E44
oklch(26.9% 0.069 294.7)
#643DAC 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) | #0056AF | 0.110 |
| Deuteranopia (no green cones) | #0053AA | 0.110 |
| Tritanopia (no blue cones) | #51576F | 0.133 |
| Achromatopsia (no color) | #555555 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643DAC
#643DAC
oklch(46.7% 0.169 295.2)
- #586000
#586000
oklch(46.6% 0.106 115.3)
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 #643DAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.036
- Bluey Purple #6241C7 ΔE 0.044
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Blurple #5539CC ΔE 0.059
- Blueberry #464196 ΔE 0.062
- Grape #7209B7 ΔE 0.069
- Iris #6258C4 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.072
Use #643DAC 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.