msScolorscope6

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <ms fontsize="14pt">boy</ms>
    <mo color="black">+</mo>
    <mstyle fontsize="24pt" color="GREEN">
      <ms>girl</ms>
      <mo color="red">+</mo>
      <ms color="red">apple</ms>
    </mstyle>
    <mo>+</mo>
    <ms>fig</ms>
  </mrow>
</math>

Author: Robert Miner and Jeff Schaefer, Geometry Technologies