Blue Contour

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500" width="100%"><path d="M406.5,292.5Q456,335,403.5,343Q351,351,347.5,414Q344,477,297,487.5Q250,498,232.5,416Q215,334,155.5,369Q96,404,67.5,370.5Q39,337,48.5,293.5Q58,250,52,207.5Q46,165,60,119.5Q74,74,116.5,52Q159,30,204.5,42Q250,54,291.5,51.5Q333,49,376,65Q419,81,400.5,138Q382,195,369.5,222.5Q357,250,406.5,292.5Z" fill="none" stroke="#0668b6" stroke-width="7"/></svg>

.blob {
  width: 500px;
  height: 500px;
  clip-path: path("M406.5,292.5Q456,335,403.5,343Q351,351,347.5,414Q344,477,297,487.5Q250,498,232.5,416Q215,334,155.5,369Q96,404,67.5,370.5Q39,337,48.5,293.5Q58,250,52,207.5Q46,165,60,119.5Q74,74,116.5,52Q159,30,204.5,42Q250,54,291.5,51.5Q333,49,376,65Q419,81,400.5,138Q382,195,369.5,222.5Q357,250,406.5,292.5Z");
}

/**
 * Blob — generated by blobs.app.
 *
 * Drop this file into your project and render <Blob /> anywhere.
 */
import { useId } from 'react';

export interface BlobProps {
  /** Rendered width and height. A number is treated as px. Defaults to 100%. */
  size?: number | string;
  /** Class name for the root svg element. */
  className?: string;
  /** Accessible name. Without it the graphic is hidden from assistive tech. */
  title?: string;
}

export function Blob({ size = '100%', className, title }: BlobProps) {
  // Unique per instance, so two blobs on one page never share a def id.
  const uid = useId().replace(/[^a-zA-Z0-9]/g, '');
  const titleId = `blob-title-${uid}`;

  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      viewBox="0 0 500 500"
      width={size}
      height={size}
      className={className}
      role={title ? 'img' : undefined}
      aria-labelledby={title ? titleId : undefined}
      aria-hidden={title ? undefined : true}
    >
      {title ? <title id={titleId}>{title}</title> : null}
      <path
        d="M406.5,292.5Q456,335,403.5,343Q351,351,347.5,414Q344,477,297,487.5Q250,498,232.5,416Q215,334,155.5,369Q96,404,67.5,370.5Q39,337,48.5,293.5Q58,250,52,207.5Q46,165,60,119.5Q74,74,116.5,52Q159,30,204.5,42Q250,54,291.5,51.5Q333,49,376,65Q419,81,400.5,138Q382,195,369.5,222.5Q357,250,406.5,292.5Z"
        fill="none"
        stroke="#0668b6"
        strokeWidth={7}
      />
    </svg>
  );
}

export default Blob;

// Generated by blobs.app.
//
// Paint the blob:
//   CustomPaint(painter: BlobPainter(), size: const Size(300, 300))
//
// Or clip a widget to it:
//   ClipPath(clipper: BlobClipper(), child: child)

import 'dart:ui' as ui;

import 'package:flutter/material.dart';

/// The blob outline, scaled from its 500x500 design space to [size].
Path buildBlobPath(Size size) {
  final double sx = size.width / 500.0;
  final double sy = size.height / 500.0;
  final Path path = Path();
  path.moveTo(406.5 * sx, 292.5 * sy);
  path.quadraticBezierTo(456.0 * sx, 335.0 * sy, 403.5 * sx, 343.0 * sy);
  path.quadraticBezierTo(351.0 * sx, 351.0 * sy, 347.5 * sx, 414.0 * sy);
  path.quadraticBezierTo(344.0 * sx, 477.0 * sy, 297.0 * sx, 487.5 * sy);
  path.quadraticBezierTo(250.0 * sx, 498.0 * sy, 232.5 * sx, 416.0 * sy);
  path.quadraticBezierTo(215.0 * sx, 334.0 * sy, 155.5 * sx, 369.0 * sy);
  path.quadraticBezierTo(96.0 * sx, 404.0 * sy, 67.5 * sx, 370.5 * sy);
  path.quadraticBezierTo(39.0 * sx, 337.0 * sy, 48.5 * sx, 293.5 * sy);
  path.quadraticBezierTo(58.0 * sx, 250.0 * sy, 52.0 * sx, 207.5 * sy);
  path.quadraticBezierTo(46.0 * sx, 165.0 * sy, 60.0 * sx, 119.5 * sy);
  path.quadraticBezierTo(74.0 * sx, 74.0 * sy, 116.5 * sx, 52.0 * sy);
  path.quadraticBezierTo(159.0 * sx, 30.0 * sy, 204.5 * sx, 42.0 * sy);
  path.quadraticBezierTo(250.0 * sx, 54.0 * sy, 291.5 * sx, 51.5 * sy);
  path.quadraticBezierTo(333.0 * sx, 49.0 * sy, 376.0 * sx, 65.0 * sy);
  path.quadraticBezierTo(419.0 * sx, 81.0 * sy, 400.5 * sx, 138.0 * sy);
  path.quadraticBezierTo(382.0 * sx, 195.0 * sy, 369.5 * sx, 222.5 * sy);
  path.quadraticBezierTo(357.0 * sx, 250.0 * sy, 406.5 * sx, 292.5 * sy);
  path.close();
  return path;
}

class BlobPainter extends CustomPainter {
  const BlobPainter();

  @override
  void paint(Canvas canvas, Size size) {
    final Path path = buildBlobPath(size);
    final Paint paint = Paint()
      ..isAntiAlias = true
      ..color = const Color(0xFF0668B6)
      ..style = PaintingStyle.stroke
      ..strokeWidth = 7.0 * (size.width / 500.0);
    canvas.drawPath(path, paint);
  }

  @override
  bool shouldRepaint(covariant BlobPainter oldDelegate) => false;
}

/// Clips any widget to the same shape: ClipPath(clipper: BlobClipper(), ...).
class BlobClipper extends CustomClipper<Path> {
  const BlobClipper();

  @override
  Path getClip(Size size) => buildBlobPath(size);

  @override
  bool shouldReclip(covariant CustomClipper<Path> oldClipper) => false;
}