One easy way would be to use TikZ as in the following MWE
Some Text \tikz\draw[red,fill=red] (0,0) circle (.5ex); further text
Where the first red defines the line style of the drawn circle to be red and the fill=red specifies, that its solid red. You could also use black,fill=red to obtain a red circle with a black border. Finally of course the .5ex is the radius of the circle.