Native speaker
In Emirati Arabic, “Blue” is أزرگ (azrag).
أزرگ
Blue
It's in the phrasebook under Yes, no & everyday basics, with 90 more like it.
aswad
bunee
rasaasee
akhdhar
burtuqaalee
'in naabee
Source: DLIFLC Emirati Basic Language Survival Kit (2007). Credits and licences