Here is a stupid script that makes a "best attempt" at extracting textmate/sublime colour themes and converts them into a pygment style to be used with Jekyll and what-have-you.
Theme files that have been tested (a very limited selection) with this script are ones that are found at:
http://tmtheme-editor.herokuapp.com/
##Usage##
Run python tmTheme2pygment.py inputColourScheme.tmTheme ~/Desktop/output.css
Replace the first argument with the location of the tmTheme file you downloaded from the link above.
Replace the second argument with where you want to output the css file.
Or if you want to batch convert a bunch at a time you can use this.
find . -name '*.tmTheme' | sed 's/\.tmTheme$//' | xargs -I FILE_NAME python tmTheme2pygment.py "FILE_NAME.tmTheme" "FILE_NAME.css"