color of my project is gone!

[gimpnoob]

sorry to make excessive threads this is a pain! you know how in gimp you have a color selection right? you can then pick the color of your project. my project (see below) is of a dung beetle but the colour is a hue of blue that is hard to pick out. gimp usually saves your colour choice but this time it is gone! I tried to make the colors again but no luck  what do I do? )

thx

(see photos)