ALL siamse have blue eyes - deeper the color the better - some almost have a violet blue shade
And I think you are talking about chocolate points with the hint of chocolate shading in the coats - they tend to stay lighter in body color then a seal or blue point.
When you are looking for your siamese, its better to use the proper color point - otherwise the person will know you don't know your siamese
Point color is seal (dark black/brown), blue (greyish color), chocolate (milk chocolate color), and lilac (pinkish blue - the lightest shading on the points). Then you have red points (reddish orange) or cream (pale buttercream points). And you can go into the tabby points (color with stripes) or tortie (seal/red point color), etc.
I recommend you go to the library and get a few siamese books out so you can read about them before you go looking for them.