brilliance; luster; colorfulness
Refers to vivid brightness, shine, or rich color, often in a visual or artistic context. 精彩 is especially used for this sense.
His paintings are full of brilliance.
This jewel emits a brilliant luster.
vividness; life
Describes liveliness, energy, or vividness in expression, performance, or personality. Often used in phrases like 精彩を欠く (to lack vitality).
His speech lacked vividness.
Her performance has life.
His play today lacked its usual spark.
The jewel gleamed brilliantly under the light.