Click on View
Select Edit layout and click on the Cog symbol
Select the Standard Colour option
Select Default Colours if you wish to select more colours
Select new colour you would like to add and click add
If you selected Colour based on field value, enter the required values For a field value between.....and.....
Click on the Paint symbol
Select colour you wish to have
Click on the OK button in the Colour Box
Click on the OK button in the Setup Field