血蓝素

• 皿(bowl; dish)RADICAL
• 丿(drop of blood; blood drop)ASSOCIATIVE

Blood is a small red drop of liquid flowing down into a bowl—picturing blood dripping into a vessel.

• 艹(grass; plant)RADICAL
• 监(supervise; monitor (for sound))PHONETIC

Plants and grass are carefully monitored to extract the precious blue-green color.

• 糸(silk thread; filament)RADICAL
• 龶(coarse undyed thread bundle; top part of thread)ASSOCIATIVE

Raw silk that hasn't been dyed suggests the meaning of pure, simple, and basic.