Your right Patrick a spider in bluette would be the most cool car on earth but you really have to want it because many people will find it boring or old school. I haven't seen one IRL.
The first two pics in my first reply show a spider recently sold by VSOC
VSOC
VSOC just describes the color as blue but in my opinion it is close to Lancia Blue.
The grey color on your picture may be the factory gray without metallic called grigio grafite (graphite gray) this color tend to die on a spider in my opinion because it lacks a glossy shine. I think the dark metallic gray colors first became popular in the late sixties but I may be wrong. Here are some pics of some variations on the gray color.
Lars