hi all sun start white in mass energy , I say blue because that as far as earth had with interactions after purging material the colour shifted to green. it is basic thermal dynamic's. like tempering or hardening steel the teal and wattle you can the specs online. the changes can occur inside the sun as well with more materials being dispersed to the top. the last phase on our world is red.
When we lived in Kenya, what "KNOCKED MY EYES OUT" was camping in Maasai Land (Kajiado District), and when the sun went down there was NO ARTIFICIAL LIGHT - NONE -ZERO - ZILCH - and the stars, well, they "KNOCKED MY EYES OUT!" INCREDIBLE!