How to change Slider label colour in Flutter?

Question

Is it possible to change the Slider label colour in Flutter?

There is no such field in constructor of Slider class.

Answer 1

According to Flutter api use valueIndicatorColor which is the property of SliderThemeData As mention here SliderClass and here SliiderThemeData

Simple Demonstration: set local variables:

double feet = 0;
String heightInFeet = "null";
int height = 180;

and Here comes your Custom Slider Solution

SliderTheme(
                  data: SliderTheme.of(context).copyWith(
                    valueIndicatorColor: Colors.blue, // This is what you are asking for
                    inactiveTrackColor: Color(0xFF8D8E98), // Custom Gray Color
                    activeTrackColor: Colors.white,
                    thumbColor: Colors.red,
                    overlayColor: Color(0x29EB1555),  // Custom Thumb overlay Color
                    thumbShape:
                        RoundSliderThumbShape(enabledThumbRadius: 12.0),
                    overlayShape:
                        RoundSliderOverlayShape(overlayRadius: 20.0),
                  ),
                  child: Slider(
                    value: height.toDouble(),
                    onChanged: (double newValue) {
                      setState(() {
                        height = newValue.toInt();
                        feet = (height / 30.48);
                        heightInFeet = feet.toStringAsFixed(2) + " feet";
                      });
                    },
                    divisions: 220,
                    label: heightInFeet,
                    min: 90.0,
                    max: 305.0,
                  ),
                )

and if you want to change Text color text font etc. use

valueIndicatorTextStyle: TextStyle(
                        color: Colors.amber, letterSpacing: 2.0)

in SliderThemeData