Refers to the color of a person's face, especially as an indicator of health. Often used in phrases like 血色がいい (have a healthy complexion) or 血色が悪い (look pale).
She has a healthy complexion and looks energetic.
I caught a cold and my complexion became pale.
blood red
Rarely used as a standalone color term; more commonly encountered in literary or descriptive contexts. Modern Japanese typically uses 血のような赤 or 血の色 for 'blood red'.
The painting depicted a blood-red sky.
pale; looking unwell; green around the gills
Compound of 血 (blood) and 色 (color). The reading けっしょく is the on'yomi of both characters.