add a hex color code in flutter code example
Example 1: how to use hexadecimal color in flutter
Color myColor = Color(0xff123456)
// where 123456 is your hex color code and
// 0xff is the opacity value and can be changed.
Example 2: flutter hex color
Color myHexColor = Color(0xff123456)
// her you notice I use the 0xff and that is opacity or transparency of the color
// and you can also change these value .