Colors used in Ubuntu UI Toolkit since OTA-10. Based on The SDK Palette article.
You can download the color palette for use with Inkscape or GIMP.
In order to make the color palette work in Inkscape, place the file in ~/.config/inkscape/palettes/ For GIMP 2.8 open ~/.gimp-2.8/palettes/ and put the file there.
Recommended for content coloring.
Recommended for foreground colors in dark themes.
Recommended for text and action icons.
Recommended for coloring dark themes' background.
Recommended for subtitles and other tertiary content.
Recommended for neutral action buttons and secondary text.
Recommended for foregrounds.
Recommended for text selection and text cursor.
Recommended for positive action buttons.
Recommended for negative and irreversible action buttons, errors and alerts.
Recommended for branded elements, display progress and intensity, textual links on light backgrounds.
Colors used when designing interfaces for color blind people. These have nothing to do with Ubuntu. Based on Set of colors that is unambiguous both to colorblinds and non-colorblinds
You can download the color palette for use with Inkscape or GIMP.
In order to make the color palette work in Inkscape, place the file in ~/.config/inkscape/palettes/ For GIMP 2.8 open ~/.gimp-2.8/palettes/ and put the file there.