with open('formatted.txt', 'a') as f:
  x = open('colors.txt','r')
  prev_line = ''

  for current_line in x:
      if prev_line.split("=>")[0].strip() != current_line.split("=>")[0].strip():
          f.write('\n')
      f.write(current_line)
      prev_line = current_line

  x.close()