#643BB3
Closest named color: Bluey Purple (#6241C7). oklch(46.9% 0.18 294), rgb(100, 59, 179).
Aa
White text reads best on this color (7.45:1).
About this color
#643BB3 is a medium-dark, vivid purple. In OKLCH its lightness is 47%, its chroma 0.180 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.034 away. White text reads best on it, at 7.45:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.180) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #643BB3 |
| RGB | rgb(100, 59, 179) |
| HSL | hsl(261, 50%, 47%) |
| OKLCH | oklch(46.9% 0.18 294) |
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 #643BB3 | 7.45:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #643BB3 | 2.81:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #643BB3 text on white | 7.45:1 | AAA | Lc 85.3 | Fine for body text |
| #643BB3 text on black | 2.81:1 | Fails | Lc -16.7 | 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
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#EAE7FA
oklch(93.6% 0.026 293.1)
-
Step 200
200
#DAD4F7
oklch(88.6% 0.048 293.3)
-
Step 300
300
#C3B6F4
oklch(80.9% 0.087 294)
-
Step 400
400
#A68EEE
oklch(70.7% 0.139 294.1)
-
Step 500
500
#926EE9
oklch(63.1% 0.179 294.2)
-
Step 600
600
#7D53D7
oklch(55.7% 0.193 293.8)
-
Step 700
700 (this color)
#643BB3
oklch(46.9% 0.18 294)
-
Step 800
800
#563797
oklch(42.7% 0.15 294)
-
Step 900
900
#473178
oklch(37.7% 0.116 294.4)
-
Step 950
950
#291D46
oklch(26.9% 0.074 294.4)
#643BB3 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) | #0056B7 | 0.111 |
| Deuteranopia (no green cones) | #0053B1 | 0.110 |
| Tritanopia (no blue cones) | #4E5872 | 0.142 |
| Achromatopsia (no color) | #555555 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643BB3
#643BB3
oklch(46.9% 0.18 294)
- #5A6000
#5A6000
oklch(46.8% 0.105 113.9)
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 #643BB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.034
- Blue With A Hint Of Purple #533CC6 ΔE 0.043
- Rebecca Purple #663399 ΔE 0.045
- Blurple #5539CC ΔE 0.049
- Purple Blue #5D21D0 ΔE 0.062
- Grape #7209B7 ΔE 0.064
- Iris #6258C4 ΔE 0.068
- Blueberry #464196 ΔE 0.069
Use #643BB3 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.