Not able to make change background color to transparent

[ilyasarafath]

Not able to make change background color to transparent, from bottom sheet background color option is available

[XeroDays]

HAving the same issue, When assign Borders to the Container

 var value = await showTopModalSheet<
                                            String?>(
                                        context,
                                        Container(
                                          height: 100,
                                          decoration: BoxDecoration(
                                              color: hexStringToColor("151515"),
                                              borderRadius: BorderRadius.only(
                                                  topLeft: Radius.circular(20),
                                                  bottomLeft:
                                                      Radius.circular(20),
                                                  bottomRight:
                                                      Radius.circular(20),
                                                  topRight:
                                                      Radius.circular(20))),
                                        ));

there is background color white shown.

[XeroDays]

Temporary Solution:

Goto the showTopModalSheet and Change the Material( color: Colors.transparent and its fixed.