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