v-md-editor/src/plugins/mermaid/mermaid.css

A markdown editor built on Vue

.github-markdown-body pre.v-md-mermaid {
  background-color: unset;
}

.vuepress-markdown-body pre.v-md-mermaid {
  background-color: unset;
}

.vuepress-markdown-body pre.v-md-mermaid code {
  color: #2c3e50;
}