Where is the blue ocean?

Reference 1: https://www.weather.gov.sg/home/ Reference 2: https://www.weather.gov.sg/weather-rain-area-50km/ Reference 3: https://www.weather.gov.sg/home/ Reference 4: https://www.weather.gov.sg/home/ Reference 5: https://www.weather.gov.sg/home/ Reference 6: https://www.weather.gov.sg/home/ Reference 7: https://www.weather.gov.sg/home/ Reference 8: https://www.weather.gov.sg/home/