Though i didn't get any answers for my question but I eventually found the answer and thought the share it for others' use.
The theme color references can be found in the word/theme/theme1.xml
file, however these references can not be directly used as the color values. First they need to be mapped from word/settings.xml
file under w:clrSchemeMapping
tag.
The following are the Hex colour values for Microsoft Word 2010 default theme from theme1.xml
file:
dk1="000000"
lt1="FFFFFF"
dk2="1F497D"
lt2="EEECE1"
accent1="4F81BD"
accent2="C0504D"
accent3="9BBB59"
accent4="8064A2"
accent5="4BACC6"
accent6="F79646"
hlink="0000FF"
folHlink="800080"