What style of painting do the gospels of charlemagne manuscripts use ?

The gospels of Charlemagne use a roman realistic style.

Hope I help :)

Carolingian art comes from the Frankish Empire in the period of roughly 120 years from about 780 to 900 — during the reign of Charlemagne and his immediate heirs — popularly known as theCarolingian Renaissance.

To let it have a splended look