在渐变的色标处获取颜色

background: linear-gradient(red, blue);

from PIL import Image, ImageDraw

def create_gradient(start_color, end_color, width, height):
    image = Image.new('RGB', (width, height))
    draw = ImageDraw.Draw(image)
    for x in range(width):
        r = int(start_color[0] + (end_color[0] - start_color[0]) * x / (width - 1))
        g = int(start_color[1] + (end_color[1] - start_color[1]) * x / (width - 1))
        b = int(start_color[2] + (end_color[2] - start_color[2]) * x / (width - 1))
        draw.line([(x, 0), (x, height)], fill=(r, g, b))
    return image

start_color = (255, 0, 0)  # 红色
end_color = (0, 0, 255)  # 蓝色
width = 200
height = 50
gradient_image = create_gradient(start_color, end_color, width, height)
gradient_image.save('gradient.png')