b()

xtd::byte xtd::drawing::color::b ( ) const

noexcept

Gets the blue component value of this xtd::drawing::color class.

Returns

byte The blue component value of this xtd::drawing::color.

Remarks

The color of each pixel is represented as a 32-bit number: 8 bits each for alpha, red, green, and blue (ARGB). The alpha component specifies the transparency of the color: 0 is fully transparent, and 255 is fully opaque. Likewise, an xtd::drawing::color::a value of 255 represents an opaque color. An xtd::drawing::color::a value from 1 through 254 represents a semitransparent color. The color becomes more opaque as xtd::drawing::color::a approaches 255.

Examples

The following code example demonstrates the xtd::drawing::color::a, xtd::drawing::color::r, xtd::drawing::color::g, and xtd::drawing::color::b properties of a xtd::drawing::color, and the Implicit(size to size_f) member.
This example is designed to be used with a Windows Form (xtd::forms). Paste the code into the form and call the show_properties_of_slate_blue method from the form's xtd::forms::control::paint event-handling method, passing e as xtd::forms::paint_event_args.

void show_properties_of_slate_blue(xtd::forms::paint_event_args& e) {
  color slate_blue = xtd::drawing::color::from_name("slate blue");
  byte g = slate_blue.g();
  byte b = slate_blue.b();
  byte r = slate_blue.r();
  byte a = slate_blue.a();
  string text = xtd::string::format("Slate blue has these ARGB values: alpha:{0}, red:{1}, green: {2}, blue {3}", a, r, g, b);
  e.graphics().draw_string(text, xtd::drawing::font(font(), xtd::drawing::font_style::italic), xtd::drawing::solid_brush(slate_blue), xtd::drawing::rectangle_f(xtd::drawing::point_f(0.0f, 0.0f), size()));
}