Anyone MOTIONLESS will also appear QUIET as any movement is SUPPRESSED.「Blue with conflict」implies severe bruising that appears after a beating used to SUPPRESS someone else, to cause quiet submission and obedient stillness. Suggestive of enforcing PEACE and QUIET, not unlike some parental methods of disciplining a child and「cleaning conflict」from among siblings using corporal punishment of a physical nature, such as caning, flogging, or whacking. Extended Japanese meanings of peaceful and serene seem to be a consequence of more violent preceding actions. Still today, many couples engage「prick meat, prick yen, longing」after a fight when the situation has QUELLED, CALMED, is now PEACEFUL and SERENE.
「Conflict, arguing until blue」might refer to passing out MOTIONLESS, unconscious due to apoplexy…but the more likely scenario is one of strangulation murder or some other cause of death of course, during which oxygen is deprived and the entire circulatory system turns blue as accumulated carbon dioxide associates with hemoglobin, SUPPRESSED air flow and motion, with the result being QUELLED, CALMED, now PEACEFUL and SERENE, and with NO FURTHER MOVEMENT anticipated from the blue corpse at least: a STIFF.
STATIC electrical discharges are most often「blue」and occur when two masses are「in conflict」in various ways, not unlike air masses during a thunderstorm, or combing fur.
「Prick meat in danger of reamer streaming」meaning STATIC and holding still prior to and during a session with a medical services provider using a bougie with an infected patient, an occasion when it is always wise to hold still.
Both element scenarios depict the aftereffects of a painful experience, something that QUIETS and causes STILLNESS, a lack of movement of any kind, SUPPRESSION of voluntary motion to avoid further pain, strongly encouraging a GENTLER and SUBMISSIVE attitude by obediently following the rules thereafter it is hoped by those remaining alive.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: still; calm; quiet; not moving
Japanese EDRDG: quiet
Unihan extended: quiet, still, motionless; gentle

Used within names (nanori)
しづ