bgRgb function
Set color to background by RGB.
See also bgRgbOpen.
Implementation
String bgRgb(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 '$bgRgbOpen$r;$g;$b$bgRgbClose';
}