Sometimes I watch badminton matches, Indonesian players look pretty dark comparing to east Asians, and even Chinese Indonesians look a bit dark, maybe it's because of the hot weather and strong sun there.
Of course Indonesian is brown skin despite we should consider it as light brown skin and that are people who are really brown who are farmer and fisherman people.
Indonesian who live in town for hundreds of years have lighter skin tone than people living in village with farming activities since their activity is primarily inside the building.
My sister daughter skin tone is white since she is kid, it is because her husband family is white skin despite native from West Sumatra, than when she grow older she swim a lot and she becomes brown, now as she is a teenager, she doesnt swim anymore and her skin tone turn into white again. Not white like North East Chinese, but white with reddish tone and I think it is perfect for women ( and she is pretty too).
Chinese Indonesian, many are still really white despite some have become brown, but the brown skin of Chinese Indonesian is due to their origin from South China. Chinese Indonesian that you see Today in Indonesia is a recent migration during Dutch rule, while older immigration have been assimilated because they have become Muslim.
Due to the fact that Dutch was Christian, so recent Chinese immigration to Indonesia become Christian to get privilage to do trade with Dutch. One of the reason Indonesian rebel to Dutch is also due to trade where native is excluded when Dutch do business with Indonesian, they only want to do business with Chinese Indonesian who are becoming Christian.
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This is High School competition, and the dark green costume is Native Indonesian since it is public school while majority of Chinese Indonesian in Indonesia study in Christian Schools where they can meet with many Chinese there and also due to religion, but Chinese Buddist I believe also study in Christian School.
The white costume is Christian School, Bukit Sion (Mount Sion), there you can see Chinese Indonesian is still quite white skin, but some players are native like number 8.