Living Wage is based on the cost of living. It should allow you to cover the basic needs for leading a decent life. These costs may differ based on where you live, and include costs for food, water, housing, energy, transport, education, healthcare, clothing, phone, unforeseen expenses, and taxes & social security.
WageIndicator publishes living wage estimates for regions in Sri Lanka such as Colombo, Gampaha, and Ratnapura. You can explore living wage estimates for regions in Sri Lanka with the tool below: