胭脂红（英文：Carmine）是红色之一，红宝石的颜色正是胭脂红。

胭脂红经常被运用于血液的描述上。胭脂红是利用血液制造的，其血液来自一种名叫胭脂虫（学名：Dactylopius coccus）的小虫子，在那个合成染料尚未诞生的年代胭脂红是自然界能够生产的最红的染料，尽管它极易褪色且昂贵无比（因为只有西班牙人知道如何生产和制造它）但还是被人们所喜爱。

胭脂虫是一种小小的，外表白得像雪一样，靠吃仙人掌而活的虫子，它的体内充满了胭脂色的血液。每到收割时人们会用空气压缩机把它们从仙人掌上吸走，压碎，过滤，最后生产出美丽又血腥的胭脂红。

Carmine is the general term for some deep red colors that are very slightly purplish but are generally slightly closer to red than the color crimson is. Some rubies are colored the color shown below as rich carmine. The deep dark red color shown at right as carmine is the color of the raw unprocessed pigment, but lighter, richer, or brighter colors are produced when the raw pigment is processed, some of which are shown below.