Cool blue color !

[Foreshore9]

I found this in the mud the edge just peeping out I love the color !

 

[Dogo]

Looks like the regular Ball blue lid for the Ball Ideal fruit jar.

 

[PlaneDiggerCam]

I always thought that if you had enough of these common glass lids or milk glass inserts you could make a mosaic out of them with the different colors and styles.