All Octicons
heart-fill
Octicon sizes navigation
React
import {HeartFillIcon} from '@primer/octicons-react' <HeartFillIcon size={16} />
Rails
<%= render(Primer::Beta::Octicon.new(:"heart-fill", size: :small)) %>
Jekyll
{% octicon heart-fill height:16 %}
Figma
This icon is called heart-fill
in Primer's Octicons library.