This is the gold standard. A "BluRay" rip means the file was sourced directly from the commercial Blu-ray disc, not a cable broadcast or streaming service. BluRay sources offer:
The term "BluRay" indicates that the file was ripped directly from a BluRay disc, rather than a DVD or a TV broadcast capture. Prison Break Season 4 720p BluRay X265 10Bit 2C
This is the most misunderstood spec. Standard videos are 8Bit (16.7 million colors). 10Bit processes over 1 billion colors. This is the gold standard