Am not very sure, but i think Landsat 8 bands 1,2,3 are very helpful for water studies; for example, turbidity discrimination 

You can use OceanSat-2 OCM Data Products.

http://218.248.0.134:8080/OCMWebSCAT/html/controller.jsp

Dear Mercy  Mwaniki, thanks for your suggestion. However,  I want satellite ocean color products such as Sentinel3, OCM2, Gilli, etc. In addition, I need satellite data with

what about GOCI? Maybe it will be helpful.

http://www.ioccg.org/sensors/GOCI.html

You can get the GOCI data from both

http://kosc.kiost.ac.kr/eng/

and

https://oceancolor.gsfc.nasa.gov/

(you can get other free OC-satellite data from the above link) 

I will second Jae-Hyun's recommendation, Ocean Color data are available for free at https://oceancolor.gsfc.nasa.gov/ including MODIS-Aqua (global), MODIS-Terra (global), VIIRS (global), SeaWiFS (global, for data before 2010), MERIS (global), OLCI (global), OCTS (global), GOCI (Geostationary data over Korea), HICO (regional, higher spectral resolution from International Space Station), as well as CZCS (if you want to go back to global coverage from 1978). Most of these sensors have at least 1 km spatial resolution, some better. Cheers!

Specifically designed for color and collecting as of today are MODIS and the two below. Pace launches around 2022.

Sentinel-3A/OLCI at https://oceandata.sci.gsfc.nasa.gov/S3OLCI/

Suomi-NPP/VIIRS at https://oceandata.sci.gsfc.nasa.gov/VIIRS/