How to add shape color in a xml ?

<pre lang="XML">

<?xml version="1.0" encoding="utf-8"?>
<grammarRule xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <name>ThreeSetofVertices</name>
  <spanning>false</spanning>
  <induced>false</induced>
  <containsAllGlobalLabels>false</containsAllGlobalLabels>
  <embeddingRules />
  <recognizeFunctions />
  <applyFunctions />
  <L>
    <globalLabels />
    <globalVariables />
    <nodes />
    <arcs />
  </L>
  <R>
    <globalLabels />
    <globalVariables />
    <nodes>
      <node xsi:type="ruleNode">
        <shapekey>6E92FCD0-75DF-4f8f-A5B2-2927E22F4F0F</shapekey>
        <screenX>23</screenX>
        <screenY>117</screenY>
        <name>L</name>
        <localLabels>
          <string>plane</string>
        </localLabels>
        <localVariables />
        <containsAllLocalLabels>false</containsAllLocalLabels>
        <strictDegreeMatch>false</strictDegreeMatch>
      </node>
      <node xsi:type="ruleNode">
        <shapekey>6E92FCD0-75DF-4f8f-A5B2-2927E22F4F0F</shapekey>
        <screenX>117</screenX>
        <screenY>40</screenY>
        <name>T</name>
        <localLabels>
          <string>plane</string>
        </localLabels>
        <localVariables />
        <containsAllLocalLabels>false</containsAllLocalLabels>
        <strictDegreeMatch>false</strictDegreeMatch>
      </node>
      <node xsi:type="ruleNode">
        <shapekey>6E92FCD0-75DF-4f8f-A5B2-2927E22F4F0F</shapekey>
        <screenX>249</screenX>
        <screenY>136</screenY>
        <name>R</name>
        <localLabels>
          <string>plane</string>
        </localLabels>
        <localVariables />
        <containsAllLocalLabels>false</containsAllLocalLabels>
        <strictDegreeMatch>false</strictDegreeMatch>
      </node>
      <node xsi:type="ruleNode">
        <shapekey>6E92FCD0-75DF-4f8f-A5B2-2927E22F4F0F</shapekey>
        <screenX>72</screenX>
        <screenY>192</screenY>
        <name>Bm</name>
        <localLabels>
          <string>plane</string>
        </localLabels>
        <localVariables />
        <containsAllLocalLabels>false</containsAllLocalLabels>
        <strictDegreeMatch>false</strictDegreeMatch>
      </node>
      <node xsi:type="ruleNode">
        <shapekey>6E92FCD0-75DF-4f8f-A5B2-2927E22F4F0F</shapekey>
        <screenX>188</screenX>
        <screenY>200</screenY>
        <name>Bc</name>
        <localLabels>
          <string>plane</string>
        </localLabels>
        <localVariables />
        <containsAllLocalLabels>false</containsAllLocalLabels>
        <strictDegreeMatch>false</strictDegreeMatch>
      </node>
      <node xsi:type="ruleNode">
        <shapekey>6E92FCD0-75DF-4f8f-A5B2-2927E22F4F0F</shapekey>
        <screenX>217</screenX>
        <screenY>64</screenY>
        <name>I</name>
        <localLabels />
        <localVariables />
        <containsAllLocalLabels>false</containsAllLocalLabels>
        <strictDegreeMatch>false</strictDegreeMatch>
      </node>
    </nodes>
    <arcs />
  </R>
</grammarRule>