Radio Crystal Blue is a freeform internet radio program, created, produced and hosted by Dan Herman, on the Live365 network. This program is a live show where spinning music of leading indie/underground artists of several genres currently performing and recording worldwide. The show is centered around the New York City area, but does spin music from songwriters and bands around the United States, as well as Canada and across Europe. Radio Crystal Blue provides commentary about where an artist is performing and when, plus anecdotal details of other artists.

Depending on the time of the year, they have dedicated airplay features, plus an annual airplay vote which determines some of the featured programming. Holiday-themed shows also air a few times per year. The show has a strong following both live and in archival form.