python pil颜色填充

Question

I have a shape below:

and I would like to colour only this shape, the background is transparent so I feel as if there is some way to colour an entire image. Right now I am using put pixel and colouring every pixel in the picture but I am wondering if there is a more efficient way to do this?

putpixel(xy=(i,j), value=(red)) , where i,j is coloured if it exists

Answer 1

Solution modified from: fill one colour

Where these two lines were changed:

white_areas = (red == 138) & (blue == 138) & (green == 138) & (alpha == 255)
data[..., ][white_areas.T] = (25, 90, 0, 190)

previous solution:

white_areas = (red == 255) & (blue == 255) & (green == 255)
data[..., :-1][white_areas.T] = (255, 0, 0) # Transpose back needed

Removed :-1 from data

What these changes mean: also able to change opacity level