Meaning
To change one's tune or loyalties; to turn one's coat.
Literally: to change colour
See it in the verse
Rang Badalna in Iqbal’s couplets
Qanaat na kar aalam-e-rang-o-bu par
Chaman aur bhi, aashiyan aur bhi hain
Chaman aur bhi, aashiyan aur bhi hain
Do not be content with this world of colour and scent — there are other gardens, and other nests, too.
Aspiration · Restlessness
Wajud-e-zan se hai tasveer-e-kaenat mein rang
Isi ke saaz se hai zindagi ka soz-e-darun
Isi ke saaz se hai zindagi ka soz-e-darun
It is the presence of woman that gives colour to the portrait of the universe — from her instrument comes the inner fire of life itself.
Love · Unity · Humility
Khudi ke zor se duniya pe chha ja
Maqam-e-rang-o-bu ka raaz pa ja
Maqam-e-rang-o-bu ka raaz pa ja
By the force of your selfhood, rise and overspread the world — and seize the secret of this realm of colour and scent.
Selfhood · Action · Aspiration