Background
You can add a background prividing `withBackground` with a custom color using `backgroundColor`, which defaults to `white`.
Usage
<HistogramG
  {bins}
  {height}
  {width}
  flags={{withBackground: true}}
  theme={{backgroundColor: '#feffd4'}}
/>Props
theme
 -  { backgroundColor: "#feffd4" }  
 - backgroundColor: "#feffd4"
 
bins
 -  (9) [ {…} ,{…} ,{…} ,{…} ,{…} , … ]  
 - 0: { range: Array(2) ,values: Array(15) }
 - 1: { range: Array(2) ,values: Array(4) }
 - 2: { range: Array(2) ,values: Array(7) }
 - 3: { range: Array(2) ,values: Array(13) }
 - 4: { range: Array(2) ,values: Array(13) }
 - 5: { range: Array(2) ,values: Array(14) }
 - 6: { range: Array(2) ,values: Array(0) }
 - 7: { range: Array(2) ,values: Array(14) }
 - 8: { range: Array(2) ,values: Array(1) }
 - length: 9
 
flags
 -  { withBackground: true  }  
 - withBackground: true