yellow is the new black? you use yellow color today because it's the national day of your home country.
sunflower is not your favorite flower but it's yellow and that's all matter.
yellow color code has been used to denote bersih (clean) that imply democratic and corruption free during the two days of demonstration for your country that took place in the globally.
and today, sitting thousand miles away from your birth country, you just said a prayer that God will rebuild the land, restore the currency and bless the country and doing justice for your folks there are fighting against a corrupted government for a clean country and a better future.
you're not politically savvy but you do care for the well being of your nation after all it's still your motherland even though you have not reside there for more than 10 years.
psalm 24:1 A Psalm of David. The earth is the LORD'S, and all it contains, The world, and those who dwell in it.