message: underline nav updates
diff: @@ -78,7 +78,7 @@ UnderlineNav.Link = styled.a.attrs(props => ({
  &.selected {
  font-weight: ${get('fontWeights.bold')};
  color: ${get('colors.gray.9')};
  - border-bottom-color: ${get('colors.orange.6')};
  + border-bottom-color: ${get('colors.orange.5')};
  .UnderlineNav-octicon {
  color: ${get('colors.gray.5')};
  