protected void paintComponent(Graphics g) {
    Insets ins = new Insets(5, 5, 5, 5);
    if (colorwell != null) {
      ColorUtil.tileStretchPaint(g, this, colorwell, ins);
    }

    // 0, 23, 255  = 235o, 100%, 100%
    // 31, 0, 204 =  249o, 100%,  80%
    g.setColor(ColorUtil.removeAlpha(getBackground()));
    g.fillRect(
        ins.left, ins.top, getWidth() - ins.left - ins.right, getHeight() - ins.top - ins.bottom);
    g.setColor(ColorUtil.setBrightness(getBackground(), 0.85f));
    g.drawRect(
        ins.left,
        ins.top,
        getWidth() - ins.left - ins.right - 1,
        getHeight() - ins.top - ins.bottom - 1);
    g.drawRect(
        ins.left + 1,
        ins.top + 1,
        getWidth() - ins.left - ins.right - 3,
        getHeight() - ins.top - ins.bottom - 3);
  }