What does purple mean, other than its definition which tells what type of color it is, in the below paragraph:
Heaven opened and the water hammered down, reviving the reluctant old well, greenmossing the pigless pigsty, carpet bombing still, tea-coloured puddles the way memory bombs still, tea-coloured minds. The grass looked wetgreen and pleased. Happy earthworms frolicked purple in the slush. Green nettles nodded. Trees bent.
This para is from God of small things by Arundhita Roy.