This function returns the current draw colour which is used for drawing forms, text, primitives and un-textured 3D models. This can be set with the draw_set_colour() function.
draw_get_colour()
var _cur_color = draw_get_color();
draw_set_color(text_color);
draw_text(x, y, text);
draw_set_color(_cur_color);
The above code stores the current draw colour into a local variable, and changes the draw colour based on an instance variable. After drawing some text, it resets the colour back to the value stored in the local variable.