It's from the item list in the patch notes. The 6 seeds split into 3 colors, 1 deepening hue and 1 lightening. On an RGB scale, it seems.
For example;
Direct link to new itemsQuote:
A bitter fruit found growing on the Rhotano Sea's Cieldalaes islands. While typically avoided by the five races, it is a favorite amongst chocobos, and is known to lighten the blue hues of their feathers.
