A web based editor for creating your own themes for phase plant.
Access it here:
https://phaseplant.blancoberg.com/

Some features:

• WYSIWYG
  Phase plant UI has been replicated so you can see the changes live while your are editing. No need to load the theme into phase plant to see how it will look.
• Color groups
  Organise the colors into groups.
• Filters
  Each color groups has a filter lane for modifiyng the colors. Currently the available filters are: Color blend, RGB values, Sepia, Grayscale, Brightness, Contrast and Hue/saturation.
• Global filters
  Same as color group filters, but it applies to all of the groups.
• Non destructive saving
  All original colors,filters and background settings are saved in the theme file, making it possible to revisit the theme for making changes.
• Background image
  It now supports adding a background image. The background image also has a set of filters. Currently available are: Color blend, Blur, Brightness, Contrast, Grayscale, hue-rotate, invert, opacity, saturate and sepia.
• Redo/undo
• Drag & drop loading
  Load a theme file, a zip containing a theme file, or images for the background by just dropping the file in the window.
• Download as Image/PNG