How are colorschemes represented in OS X Terminal.app Settings Files?
bplist means binary property list, which can be converted to XML with plutil -convert xml1. Inside each plist for a color is another data key for the fractional RGB values.

/usr/libexec/PlistBuddy -x -c 'Print "Window Settings":"My Theme"' ~/Library/Preferences/com.apple.Terminal.plist|tr -d '\n\t'|grep -o '[^&gt;]*&lt;/key&gt;&lt;data&gt;[^&lt;]*'|while read l;do echo ${l%%&lt;*} $(base64 -D&lt;&lt;&lt;${l##*&gt;}|plutil -convert xml1 - -o -|awk '/&lt;data&gt;/{getline;print}'|tr -d '\t'|base64 -D);done

The output looks like this:

ANSIBlueColor 0.4769933663 0.4769933663 0.9314516129
ANSICyanColor 0.2666655827 0.8165705831 0.8588709677
ANSIGreenColor 0.428833897 0.8508064516 0.490967087
ANSIMagentaColor 0.9072580645 0.4499707336 0.9072580645
ANSIRedColor 0.9072580645 0.508503512 0.508503512
ANSIYellowColor 0.9072580645 0.9072580645 0.3914379553
CursorColor 0.9998760223 0.999984026 0.999786377
SelectionColor 0.3899414837 0.4639441073 0.5917825699
TextBoldColor 0.9441435337 0.4102420509 0.427282244
TextColor 1 0.99997437 0.9999912977