Advice

I have a string in Flutter that represents a color. The string can be:

  • A hexadecimal color code like #FFFFFF or #000000

  • A named color like "white", "black", "red"

I want to convert this string into a Color object.

I know I can maintain a map like:

{'white': '#FFFFFF', 'black': '#000000'}

But this is not feasible because I cannot predict all possible color names.

What I tried:

For hex strings, I wrote this helper:


static Color hex(String hexColor) {
  hexColor = hexColor.toUpperCase().replaceAll('#', '');
  if (hexColor.length == 6) {
    hexColor = 'FF$hexColor'; // Add alpha if missing
  }
  return Color(int.parse(hexColor, radix: 16));
}

Is there a built-in Flutter/Dart way to handle both cases?

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3 Replies 3

Munsif Ali
•

There isn't a single built-in Flutter/Dart function to convert a string that could be either a hex code OR a named color into a Color object without maintaining a lookup map for the named colors.

There is a package named color which has a map of color you can use that in your project checkout the list

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Omi Shah
•

You can use the flutter_color package and achieve what you'e looking for without maintaining manual color mapping.

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Gowtham
•

How it will solve my problem? I expect to pass the string to a method it may either hex code string or named color string and it should return the color.

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