How do I get the color code for my Flutter?

“how to use color code in flutter” Code Answer’s

withAlpha method Null safety Returns a new color that matches this color with the alpha channel replaced with a (which ranges from 0 to 255) . Out of range values will have unexpected effects.

We need to prefix 0xff at hex color code.

In flutter, color is defined using a Color class. The Flutter color class accepts an immutable 32-bit color value in ARGB format .