绿 is another dyed silk 纟, with 录 lending the sound lǜ. The classic poets loved it as a verb: 春风又绿江南岸 — 'spring wind greens the river's southern bank again' — Wang Anshi famously revised that one character ten times before choosing 绿.
绿 colors modern life: 绿色 (green — also 'eco/organic' as in 绿色食品), 绿茶 (green tea, the daily default across China). One famous trap: 绿帽子 ('green hat') means being cheated on — never gift a Chinese man a green hat. Traffic 绿灯 means go; a project's 开绿灯 means it's been approved. Spring's color moves everything forward.
Silk 纟 dyed spring's color — GREEN.
The 'green hat' taboo (戴绿帽子 = being cheated on) dates to Yuan-dynasty dress codes — 700 years of avoiding one accessory.