<html xmlns="http://www.w3.org/1999/xhtml" xmlns:m="http://www.w3.org/1998/Math/MathML"> <body> <!-- ... assuming that color inherits --> <p> <span style="color: green"><m:math><m:mstyle><m:mi>X</m:mi></m:mstyle></m:math></span> <span style="color: green"><m:math><m:mstyle><m:mi>X</m:mi></m:mstyle></m:math></span> <span style="color: green"><m:math><m:mstyle><m:mi>X</m:mi></m:mstyle></m:math></span> </p> <!-- ... assuming that color inherits --> <p> <span style="color: green"><m:math><m:mstyle><m:mi>X</m:mi></m:mstyle></m:math></span> <span style="color: green"><m:math><m:mstyle><m:mi>X</m:mi></m:mstyle></m:math></span> <span style="color: green"><m:math><m:mstyle><m:mi>X</m:mi></m:mstyle></m:math></span> </p> <!-- ... assuming that mathbackground works on m:mstyle --> <p><m:math><m:mstyle mathbackground="lightgreen"><m:mi>Y</m:mi></m:mstyle></m:math></p> <p><m:math><m:mstyle mathbackground="lightgreen"><m:mi>Y</m:mi></m:mstyle></m:math></p> <!-- ... assuming that mathbackground works on m:mstyle --> <p><m:math><m:mstyle mathbackground="lightgreen"><m:mfenced><m:mi>x</m:mi></m:mfenced></m:mstyle></m:math></p> <p><m:math><m:mstyle mathbackground="lightgreen"><m:mfenced><m:mi>x</m:mi></m:mfenced></m:mstyle></m:math></p> </body> </html>