How to replace the color from blue to white?

from pickletools import uint8
import numpy as np
from PIL import Image

image=Image.open('flower.jpg')
arr=np.array(image)
#arr[:,:]=[,,0]

print(arr.shape)
print(arr.dtype)
print(arr.size)
print(arr)

img=Image.fromarray(arr)


#img.save('flowerr.png',arr)
img.show()