The official elementary OS color palette in .gpl format for use with Inkscape and potentially GIMP.
For use in Inkscape, simply copy the elementary-os.gpl file to /usr/share/inkscape/palettes/ by running:
sudo wget -P /usr/share/inkscape/palettes/ https://raw.githubusercontent.com/Heiko-M/elementary-os-color-palette/master/elementary-os.gpl
Open Inkscape and click the little arrow all the way to the right of the color selection bar and choose the elementary OS Palette.