Rendering colors

Hi everyone,

I’m a newbie here. Why do I get the huge discrepancy between the colors of the drawn solid in the drawing window and between the rendered image?

Window:

Rendered image:

Settings:

Am I doing something wrong here? I chose custom materials and added the transparency that I’d like to have after rendering, didn’t add spotlights, and then rendered using the default Rhino renderer settings. How can I get a high quality rendered image (something at least close to the one in the drawing window)? Any help here would be appreciated.