The Sun was blue and without light, then red like blood, Korea, early 1258

Goryeosa volume 47: '四十五年二月壬辰，日靑，無光。三月丁卯，日色赤如血', Gojong year 45, months 2 and 3, about March and April 1258. Months after Samalas, the largest eruption of the last thousand years, and in the same year that European chroniclers saw black lunar eclipses. A blue Sun is a known sign of a volcanic veil with particles of just the right size.