Android: Setting "color" to null on Label causes color to be transparent

problem

When setting the color property of a Ti.UI.Label to null it makes the color transparent on Android. On iOS and Mobileweb the color is returned to the default black (#000). While the default color can be determined by the underlying platform, it should be a visible color to give parity across the platforms. In others words, setting color to null should either make the color transparent on all platforms, or a solid color on all platforms.

expected

When I set the the color property of a Ti.UI.Label to null, I expect the behavior, whether it makes the Label transparent or a solid color, to be the same on all platforms.

test case

app.js

var win = Ti.UI.createWindow({

	backgroundColor: '#fff',

	modal: false,

	exitOnClose: true

});

var label = Ti.UI.createLabel({

	text: 'just a test label'

});

label.addEventListener('click', function(e) {

	label.color = null;

});

win.add(label);

win.open();