fgRgb function
Set color to foreground by RGB.
See also fgRgbOpen.
Implementation
String fgRgb(int r, int g, int b) {
assert(r >= 0 && r <= 255, _colorComponentAssert);
assert(g >= 0 && g <= 255, _colorComponentAssert);
assert(b >= 0 && b <= 255, _colorComponentAssert);
return '$fgRgbOpen$r;$g;$b$fgRgbClose';
}