枕头图像颜色看起来很奇怪

如何解决枕头图像颜色看起来很奇怪

Pillow 正在将个人资料图片粘贴到基本图片上，但颜色看起来很奇怪。代码如下：

from discord import file
from discord.client import Client
from discord.ext import commands
import discord
from PIL import Image
from io import BytesIO


class Test(commands.Cog):
    def __init__(self,client):
        self.client = client
    @commands.command()
    async def test(self,ctx,user: discord.Member = None):
        if user == None:
            user = ctx.author

        msg = await ctx.send('Generating profile,please wait!')
        img = Image.open('card.png')
        asset = user.avatar_url_as(size=128)
        data = BytesIO(await asset.read())
        pfp = Image.open(data).convert('RGB') 
        pfp = pfp.resize((100,100))  
        img.paste(pfp,(75,71))
        img.save('profile.png')

        file = discord.File('profile.png',filename='profile.png')
        await msg.delete()
        await ctx.send(file=file)

这是基本图像。

这是运行命令后的图像。

感谢任何帮助