excalidraw/src/components/ColorPicker.tsx

import React from "react";
import { TwitterPicker } from "react-color";

export function ColorPicker({
  color,
  onChange
}: {
  color: string | null;
  onChange: (color: string) => void;
}) {
  const [isActive, setActive] = React.useState(false);
  return (
    <div>
      <button
        className="swatch"
        style={color ? { backgroundColor: color } : undefined}
        onClick={() => setActive(!isActive)}
      />
      {isActive ? (
        <div className="popover">
          <div className="cover" onClick={() => setActive(false)} />
          <TwitterPicker
            colors={[
              "#000000",
              "#ABB8C3",
              "#FFFFFF",
              "#FF6900",
              "#FCB900",
              "#00D084",
              "#8ED1FC",
              "#0693E3",
              "#EB144C",
              "#F78DA7",
              "#9900EF"
            ]}
            width="205px"
            color={color || undefined}
            onChange={changedColor => {
              onChange(changedColor.hex);
            }}
          />
        </div>
      ) : null}
      <input
        type="text"
        className="swatch-input"
        value={color || ""}
        onPaste={e => onChange(e.clipboardData.getData("text"))}
        onChange={e => onChange(e.target.value)}
      />
    </div>
  );
}