User blog comment:Eri aizawa/question???/@comment-35608187-20190711111629

1. Everyone knows this stuff.

2. The reason Dabi's flames are blue would be because blue flames are hotter, and more intense. it's not from his mother's ice. Incase you've never seen ice before, it's not naturally blue, it's clear. the reason Shoto's ice is blue is purely an aestetic choice, to help it stand out against other backgrounds.