There are 24 groups this season with "blue" in there name, so here's a list of them!
DC
Blue Stripes (DCL)
Blue Horns (LGDC)
Blue Cadets (LGDC)
Blue Spocks (DCL)
Blue Italians (LGDC)
Blue Dutchmen (CLASS)
Blue Englishmen
Blue Bongos (LGDC)
Blue Scotsmen
Blue Norwegians
Blue Germans
Blue Aminoacyl tRNA synthatase
MB
Blue Diamonds (ENCORE)
Blue Gocks (UBA)
Blue Phosphodiester Bonds
CG
Blue Cadets (LGCG)
Blue Diamonds (INS)
Blue Gerrymanders (LGCG)
Blue DNA Polymerase III Holoenzyme
DL
Blue Cadets (LGDL)
Blue Drummin’ Italians (LGDL)
Blue Monarchs (LGDL)
Blue Timbales (LGDL)
Blue Phospholipid Bilayer

Notable mentions include
Aquacoats (LGDC)
Azure Crest (DCL)

DC
Blue Stripes (DCL)
Blue Horns (LGDC)
Blue Cadets (LGDC)
Blue Spocks (BBB)
Blue Italians (LGDC)
Blue Dutchmen (CLASS)
Blue Englishmen (BBB)
Blue Bongos (BBB)
Blue Scotsmen (BBB)
Blue Norwegians (LGDC)
Blue Germans (BBB)
Blue Aminoacyl tRNA synthatase (BBB)
MB
Blue Diamonds (ENCORE)
Blue Gocks (UBA)
Blue Phosphodiester Bonds
CG
Blue Cadets (LGCG)
Blue Diamonds (INS)
Blue Gerrymanders (LGCG)
Blue DNA Polymerase III Holoenzyme
DL
Blue Cadets (LGDL)
Blue Drummin’ Italians (LGDL)
Blue Monarchs (LGDL)
Blue Timbales (LGDL)
Blue Phospholipid Bilayer

Notable mentions include
Aquacoats (LGDC)
Azure Crest (DCL)

I updated it for you

My groups (with the exception of my marching band) is based on the senior drum corps the Gulf Blue Knights based out of Keesler Air Force Base in Biloxi, MS. I dropped the Blue because of Blue Knights irl, so I’m blue once removed.