How do I use RGB color in Flutter?

Question

I am trying to use it like this but it is giving me no color on text.

Color.fromARGB(1, 239 ~/ 255, 58 ~/ 255, 121 ~/ 255)

Answer 1

Try using

Color.fromRGBO(38, 38, 38, 0.4)

Where r is for Red, g is for Green, b is for Blueand o is for opacity

Example:

Container(
                width: double.infinity,
                height: double.infinity,
                color: Color.fromRGBO(38, 38, 38, 0.4),
                child: Center(
                  child: CircularProgressIndicator(),
                ))

Answer 2

You can also use the hexadecimal representation Color(0XFF212845).
Comment from source

/// In other words, if AA is the alpha value in hex, RR the red value in hex,
/// GG the green value in hex, and BB the blue value in hex, a color can be
/// expressed as const Color(0xAARRGGBB).

Answer 3

I am using this code block for a personal project of mine in order to show text with a specific color using Color.fromRGBO, first parameter is Red, second is Green, third is Blue and last parameter defines the Opacity.

Text(
    "This is a sample text",
     textAlign: TextAlign.center,
     style: TextStyle(
             color: Color.fromRGBO(255, 179, 102, 1)
    )
)

Answer 4

If you want to specify opacity as a double value between 0.0 (transparent) and 1.0 (fully opaque), use Color.fromRGBO(). The opacity value is the last parameter.

Color.fromRGBO(int r, int g, int b, double opacity)

But if you want to specify opacity as an integer value between 0 (transparent) and 255 (fully opaque), use Color.fromARGB(). The opacity value is the first parameter.

Color.fromARGB(int a, int r, int g, int b)

The r, g, b parameters of both methods are integer values between 0 and 255.