noun
dark blue ground; dark blue background
Refers to a dark blue base color, especially in textiles, ceramics, or design contexts.
この着物は紺地に白い花模様が入っている。
This kimono has a white flower pattern on a dark blue ground.
noun
dark blue cloth; dark blue fabric
Specifically refers to cloth or fabric that is dark blue in color.
紺地の布でバッグを作った。
I made a bag out of dark blue cloth.