opencode/packages/ui/src/components/avatar.css

[data-component="avatar"] {
  --avatar-bg: var(--color-surface-info-base);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-weak-base);
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  background-color: var(--avatar-bg);
  color: oklch(from var(--avatar-bg) calc(l * 0.72) calc(c * 8) h);
}

[data-component="avatar"][data-has-image] {
  background-color: transparent;
  border: none;
}

[data-component="avatar"][data-size="small"] {
  width: 1.25rem;
  height: 1.25rem;
  font-size: 0.75rem;
  line-height: 1;
}

[data-component="avatar"][data-size="normal"] {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 1.125rem;
  line-height: 1.5rem;
}

[data-component="avatar"][data-size="large"] {
  width: 2rem;
  height: 2rem;
  font-size: 1.25rem;
  line-height: 2rem;
}