message: set default to blue.5 instead of blue.4
diff: @@ -4,7 +4,7 @@ import {withSystemProps, TYPOGRAPHY} from './system-props'
  import theme from './theme'
  import {themeGet, get} from 'styled-system'
  -const getHoverColor = (hoverColor = 'blue.4') => {
  +const getHoverColor = (hoverColor = 'blue.5') => {
  const path = `colors.${hoverColor}`
  const fallback = theme.colors.blue[5]
  return themeGet(path, fallback)
  